Use the SPDX-License-Identifier in all source files

89 files changed, 89 insertions, 1335 deletions

diff --git a/libappstream-glib/appstream-glib.h b/libappstream-glib/appstream-glib.h
index 3082b6e..c42b64c 100644
--- a/libappstream-glib/appstream-glib.h
+++ b/libappstream-glib/appstream-glib.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #ifndef __APPSTREAM_GLIB_H
diff --git a/libappstream-glib/as-agreement-private.h b/libappstream-glib/as-agreement-private.h
index fb6132b..e5df83d 100644
--- a/libappstream-glib/as-agreement-private.h
+++ b/libappstream-glib/as-agreement-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-agreement-section-private.h b/libappstream-glib/as-agreement-section-private.h
index 315972d..ec683a7 100644
--- a/libappstream-glib/as-agreement-section-private.h
+++ b/libappstream-glib/as-agreement-section-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-agreement-section.c b/libappstream-glib/as-agreement-section.c
index f911858..400d688 100644
--- a/libappstream-glib/as-agreement-section.c
+++ b/libappstream-glib/as-agreement-section.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-agreement-section.h b/libappstream-glib/as-agreement-section.h
index 5f56a57..5971b59 100644
--- a/libappstream-glib/as-agreement-section.h
+++ b/libappstream-glib/as-agreement-section.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-agreement.c b/libappstream-glib/as-agreement.c
index c73347b..ee2c228 100644
--- a/libappstream-glib/as-agreement.c
+++ b/libappstream-glib/as-agreement.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-agreement.h b/libappstream-glib/as-agreement.h
index a832a7a..754ca3b 100644
--- a/libappstream-glib/as-agreement.h
+++ b/libappstream-glib/as-agreement.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-app-builder.c b/libappstream-glib/as-app-builder.c
index 046bb6a..9b2c0b3 100644
--- a/libappstream-glib/as-app-builder.c
+++ b/libappstream-glib/as-app-builder.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-app-builder.h b/libappstream-glib/as-app-builder.h
index dba3fe4..a7567dc 100644
--- a/libappstream-glib/as-app-builder.h
+++ b/libappstream-glib/as-app-builder.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-app-desktop.c b/libappstream-glib/as-app-desktop.c
index c2d6555..64a019a 100644
--- a/libappstream-glib/as-app-desktop.c
+++ b/libappstream-glib/as-app-desktop.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2013-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include <fnmatch.h>
diff --git a/libappstream-glib/as-app-inf.c b/libappstream-glib/as-app-inf.c
index 61441d8..0292fc2 100644
--- a/libappstream-glib/as-app-inf.c
+++ b/libappstream-glib/as-app-inf.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2013-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include <fnmatch.h>
diff --git a/libappstream-glib/as-app-private.h b/libappstream-glib/as-app-private.h
index b242627..fa9bf22 100644
--- a/libappstream-glib/as-app-private.h
+++ b/libappstream-glib/as-app-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-app-validate.c b/libappstream-glib/as-app-validate.c
index a9ad2ca..742b968 100644
--- a/libappstream-glib/as-app-validate.c
+++ b/libappstream-glib/as-app-validate.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-app.c b/libappstream-glib/as-app.c
index 5604c5d..73859d1 100644
--- a/libappstream-glib/as-app.c
+++ b/libappstream-glib/as-app.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-app.h b/libappstream-glib/as-app.h
index 3e62b7d..9e7b537 100644
--- a/libappstream-glib/as-app.h
+++ b/libappstream-glib/as-app.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-bundle-private.h b/libappstream-glib/as-bundle-private.h
index e52b757..05543cc 100644
--- a/libappstream-glib/as-bundle-private.h
+++ b/libappstream-glib/as-bundle-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-bundle.c b/libappstream-glib/as-bundle.c
index c8a8d7e..e3eb247 100644
--- a/libappstream-glib/as-bundle.c
+++ b/libappstream-glib/as-bundle.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-bundle.h b/libappstream-glib/as-bundle.h
index 4d6af05..2409b76 100644
--- a/libappstream-glib/as-bundle.h
+++ b/libappstream-glib/as-bundle.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-checksum-private.h b/libappstream-glib/as-checksum-private.h
index dd28e5f..324e50a 100644
--- a/libappstream-glib/as-checksum-private.h
+++ b/libappstream-glib/as-checksum-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-checksum.c b/libappstream-glib/as-checksum.c
index 876fe77..cf6731c 100644
--- a/libappstream-glib/as-checksum.c
+++ b/libappstream-glib/as-checksum.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-checksum.h b/libappstream-glib/as-checksum.h
index bfdf311..bdc24dd 100644
--- a/libappstream-glib/as-checksum.h
+++ b/libappstream-glib/as-checksum.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-content-rating-private.h b/libappstream-glib/as-content-rating-private.h
index 815d371..da95958 100644
--- a/libappstream-glib/as-content-rating-private.h
+++ b/libappstream-glib/as-content-rating-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-content-rating.c b/libappstream-glib/as-content-rating.c
index 059a625..6d6ae76 100644
--- a/libappstream-glib/as-content-rating.c
+++ b/libappstream-glib/as-content-rating.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-content-rating.h b/libappstream-glib/as-content-rating.h
index f9bcb8b..ba30cea 100644
--- a/libappstream-glib/as-content-rating.h
+++ b/libappstream-glib/as-content-rating.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-enums.c b/libappstream-glib/as-enums.c
index d5ca7d0..5e827d4 100644
--- a/libappstream-glib/as-enums.c
+++ b/libappstream-glib/as-enums.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-enums.h b/libappstream-glib/as-enums.h
index beeae7f..2e1995c 100644
--- a/libappstream-glib/as-enums.h
+++ b/libappstream-glib/as-enums.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-format.c b/libappstream-glib/as-format.c
index 96919e6..e77419e 100644
--- a/libappstream-glib/as-format.c
+++ b/libappstream-glib/as-format.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-format.h b/libappstream-glib/as-format.h
index a269c52..a8670ca 100644
--- a/libappstream-glib/as-format.h
+++ b/libappstream-glib/as-format.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-icon-private.h b/libappstream-glib/as-icon-private.h
index df6f891..9e19e26 100644
--- a/libappstream-glib/as-icon-private.h
+++ b/libappstream-glib/as-icon-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-icon.c b/libappstream-glib/as-icon.c
index 01324a7..f1d59c7 100644
--- a/libappstream-glib/as-icon.c
+++ b/libappstream-glib/as-icon.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-icon.h b/libappstream-glib/as-icon.h
index 8b0f5f7..ba0c197 100644
--- a/libappstream-glib/as-icon.h
+++ b/libappstream-glib/as-icon.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-image-private.h b/libappstream-glib/as-image-private.h
index 927cbe7..fa5ad2d 100644
--- a/libappstream-glib/as-image-private.h
+++ b/libappstream-glib/as-image-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-image.c b/libappstream-glib/as-image.c
index e5b00d2..aacf539 100644
--- a/libappstream-glib/as-image.c
+++ b/libappstream-glib/as-image.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-image.h b/libappstream-glib/as-image.h
index 9f3a3d7..f94c75d 100644
--- a/libappstream-glib/as-image.h
+++ b/libappstream-glib/as-image.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-inf.c b/libappstream-glib/as-inf.c
index c3450bc..72b64ca 100644
--- a/libappstream-glib/as-inf.c
+++ b/libappstream-glib/as-inf.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-inf.h b/libappstream-glib/as-inf.h
index ba99184..44aff50 100644
--- a/libappstream-glib/as-inf.h
+++ b/libappstream-glib/as-inf.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-launchable-private.h b/libappstream-glib/as-launchable-private.h
index 82062f7..9b65a0c 100644
--- a/libappstream-glib/as-launchable-private.h
+++ b/libappstream-glib/as-launchable-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-launchable.c b/libappstream-glib/as-launchable.c
index 151d641..c1e4fd1 100644
--- a/libappstream-glib/as-launchable.c
+++ b/libappstream-glib/as-launchable.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This desktop-id is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This desktop-id is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this desktop-id; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-launchable.h b/libappstream-glib/as-launchable.h
index 56d1b1a..7ff6941 100644
--- a/libappstream-glib/as-launchable.h
+++ b/libappstream-glib/as-launchable.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-markup.c b/libappstream-glib/as-markup.c
index f376bf9..51e47c6 100644
--- a/libappstream-glib/as-markup.c
+++ b/libappstream-glib/as-markup.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-markup.h b/libappstream-glib/as-markup.h
index 9bca99a..203375d 100644
--- a/libappstream-glib/as-markup.h
+++ b/libappstream-glib/as-markup.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-monitor.c b/libappstream-glib/as-monitor.c
index f7bdfce..683c144 100644
--- a/libappstream-glib/as-monitor.c
+++ b/libappstream-glib/as-monitor.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-monitor.h b/libappstream-glib/as-monitor.h
index 511215a..30c7129 100644
--- a/libappstream-glib/as-monitor.h
+++ b/libappstream-glib/as-monitor.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-node-private.h b/libappstream-glib/as-node-private.h
index c223889..a15be13 100644
--- a/libappstream-glib/as-node-private.h
+++ b/libappstream-glib/as-node-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-node.c b/libappstream-glib/as-node.c
index f0d13fc..d64a169 100644
--- a/libappstream-glib/as-node.c
+++ b/libappstream-glib/as-node.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-node.h b/libappstream-glib/as-node.h
index 913c1c8..6609947 100644
--- a/libappstream-glib/as-node.h
+++ b/libappstream-glib/as-node.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-problem.c b/libappstream-glib/as-problem.c
index 92cf913..ab95899 100644
--- a/libappstream-glib/as-problem.c
+++ b/libappstream-glib/as-problem.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-problem.h b/libappstream-glib/as-problem.h
index 700e946..305f34e 100644
--- a/libappstream-glib/as-problem.h
+++ b/libappstream-glib/as-problem.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-profile.c b/libappstream-glib/as-profile.c
index 74d4f4f..28fdc7c 100644
--- a/libappstream-glib/as-profile.c
+++ b/libappstream-glib/as-profile.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2013-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU General Public License Version 2
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-profile.h b/libappstream-glib/as-profile.h
index 9f3fc83..b82b72f 100644
--- a/libappstream-glib/as-profile.h
+++ b/libappstream-glib/as-profile.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2013-2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU General Public License Version 2
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #ifndef __AS_PROFILE_H
diff --git a/libappstream-glib/as-provide-private.h b/libappstream-glib/as-provide-private.h
index 3e15c35..a7872b8 100644
--- a/libappstream-glib/as-provide-private.h
+++ b/libappstream-glib/as-provide-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-provide.c b/libappstream-glib/as-provide.c
index 350bf35..88ac2a6 100644
--- a/libappstream-glib/as-provide.c
+++ b/libappstream-glib/as-provide.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-provide.h b/libappstream-glib/as-provide.h
index 78aa5de..24a883a 100644
--- a/libappstream-glib/as-provide.h
+++ b/libappstream-glib/as-provide.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-ref-string.c b/libappstream-glib/as-ref-string.c
index bd4164c..747ae48 100644
--- a/libappstream-glib/as-ref-string.c
+++ b/libappstream-glib/as-ref-string.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-ref-string.h b/libappstream-glib/as-ref-string.h
index a0a625f..414afd1 100644
--- a/libappstream-glib/as-ref-string.h
+++ b/libappstream-glib/as-ref-string.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-release-private.h b/libappstream-glib/as-release-private.h
index 766eda0..7bd49df 100644
--- a/libappstream-glib/as-release-private.h
+++ b/libappstream-glib/as-release-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-release.c b/libappstream-glib/as-release.c
index bb1537f..6a71f99 100644
--- a/libappstream-glib/as-release.c
+++ b/libappstream-glib/as-release.c
@@ -3,21 +3,7 @@
  * Copyright (C) 2014-2018 Richard Hughes <richard@hughsie.com>
  * Copyright (C) 2018 Matthias Klumpp <matthias@tenstral.net>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-release.h b/libappstream-glib/as-release.h
index 5455ea6..c6d1c30 100644
--- a/libappstream-glib/as-release.h
+++ b/libappstream-glib/as-release.h
@@ -3,21 +3,7 @@
  * Copyright (C) 2014-2018 Richard Hughes <richard@hughsie.com>
  * Copyright (C) 2018 Matthias Klumpp <matthias@tenstral.net>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-require-private.h b/libappstream-glib/as-require-private.h
index 98ff8b4..b03f379 100644
--- a/libappstream-glib/as-require-private.h
+++ b/libappstream-glib/as-require-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-require.c b/libappstream-glib/as-require.c
index 11a1dc3..5dfe6e4 100644
--- a/libappstream-glib/as-require.c
+++ b/libappstream-glib/as-require.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-require.h b/libappstream-glib/as-require.h
index 0b01a20..f71f3ee 100644
--- a/libappstream-glib/as-require.h
+++ b/libappstream-glib/as-require.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-review-private.h b/libappstream-glib/as-review-private.h
index a8322ab..144bada 100644
--- a/libappstream-glib/as-review-private.h
+++ b/libappstream-glib/as-review-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-review.c b/libappstream-glib/as-review.c
index 053fe63..2b9fd16 100644
--- a/libappstream-glib/as-review.c
+++ b/libappstream-glib/as-review.c
@@ -3,21 +3,7 @@
  * Copyright (C) 2016 Canonical Ltd.
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-review.h b/libappstream-glib/as-review.h
index a2633e2..df14d4f 100644
--- a/libappstream-glib/as-review.h
+++ b/libappstream-glib/as-review.h
@@ -3,21 +3,7 @@
  * Copyright (C) 2016 Canonical Ltd.
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-screenshot-private.h b/libappstream-glib/as-screenshot-private.h
index 7592738..ff6fd62 100644
--- a/libappstream-glib/as-screenshot-private.h
+++ b/libappstream-glib/as-screenshot-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-screenshot.c b/libappstream-glib/as-screenshot.c
index a4b5ead..b9db9da 100644
--- a/libappstream-glib/as-screenshot.c
+++ b/libappstream-glib/as-screenshot.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-screenshot.h b/libappstream-glib/as-screenshot.h
index a56be90..4942aab 100644
--- a/libappstream-glib/as-screenshot.h
+++ b/libappstream-glib/as-screenshot.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-self-test.c b/libappstream-glib/as-self-test.c
index f9facaa..1758bb8 100644
--- a/libappstream-glib/as-self-test.c
+++ b/libappstream-glib/as-self-test.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-stemmer.c b/libappstream-glib/as-stemmer.c
index a7666c4..946898b 100644
--- a/libappstream-glib/as-stemmer.c
+++ b/libappstream-glib/as-stemmer.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU General Public License Version 2
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-stemmer.h b/libappstream-glib/as-stemmer.h
index 8883d68..480640a 100644
--- a/libappstream-glib/as-stemmer.h
+++ b/libappstream-glib/as-stemmer.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU General Public License Version 2
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #ifndef __AS_STEMMER_H
diff --git a/libappstream-glib/as-store-cab.c b/libappstream-glib/as-store-cab.c
index d6e4da4..166894e 100644
--- a/libappstream-glib/as-store-cab.c
+++ b/libappstream-glib/as-store-cab.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-store-cab.h b/libappstream-glib/as-store-cab.h
index 7cba6e8..6139071 100644
--- a/libappstream-glib/as-store-cab.h
+++ b/libappstream-glib/as-store-cab.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2015 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-store.c b/libappstream-glib/as-store.c
index 3a03fcd..2401f62 100644
--- a/libappstream-glib/as-store.c
+++ b/libappstream-glib/as-store.c
@@ -3,21 +3,7 @@
  * Copyright (C) 2013-2016 Richard Hughes <richard@hughsie.com>
  * Copyright (C) 2015-2018 Kalev Lember <klember@redhat.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-store.h b/libappstream-glib/as-store.h
index b15aca4..0bb1947 100644
--- a/libappstream-glib/as-store.h
+++ b/libappstream-glib/as-store.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2013-2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-suggest-private.h b/libappstream-glib/as-suggest-private.h
index ed2aa76..f110709 100644
--- a/libappstream-glib/as-suggest-private.h
+++ b/libappstream-glib/as-suggest-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-suggest.c b/libappstream-glib/as-suggest.c
index 039a950..d9f90ac 100644
--- a/libappstream-glib/as-suggest.c
+++ b/libappstream-glib/as-suggest.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-suggest.h b/libappstream-glib/as-suggest.h
index ddae4c8..0e669bc 100644
--- a/libappstream-glib/as-suggest.h
+++ b/libappstream-glib/as-suggest.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-tag.c b/libappstream-glib/as-tag.c
index 27ffb47..fd54f5b 100644
--- a/libappstream-glib/as-tag.c
+++ b/libappstream-glib/as-tag.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2017 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-tag.h b/libappstream-glib/as-tag.h
index f7de3b8..b5488f1 100644
--- a/libappstream-glib/as-tag.h
+++ b/libappstream-glib/as-tag.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2017 Richard Hughes <richard@hughsie.com`
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-translation-private.h b/libappstream-glib/as-translation-private.h
index 184b18d..131b066 100644
--- a/libappstream-glib/as-translation-private.h
+++ b/libappstream-glib/as-translation-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-translation.c b/libappstream-glib/as-translation.c
index 883dddd..c15f56a 100644
--- a/libappstream-glib/as-translation.c
+++ b/libappstream-glib/as-translation.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-translation.h b/libappstream-glib/as-translation.h
index 333f9dc..4be5297 100644
--- a/libappstream-glib/as-translation.h
+++ b/libappstream-glib/as-translation.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-utils-private.h b/libappstream-glib/as-utils-private.h
index 5e16993..83e427e 100644
--- a/libappstream-glib/as-utils-private.h
+++ b/libappstream-glib/as-utils-private.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_PRIVATE_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-utils.c b/libappstream-glib/as-utils.c
index 6f46e52..dd71f02 100644
--- a/libappstream-glib/as-utils.c
+++ b/libappstream-glib/as-utils.c
@@ -3,21 +3,7 @@
  * Copyright (C) 2014-2016 Richard Hughes <richard@hughsie.com>
  * Copyright (C) 2011 Paolo Bacchilega <paobac@src.gnome.org>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-utils.h b/libappstream-glib/as-utils.h
index 2fa5199..a72162c 100644
--- a/libappstream-glib/as-utils.h
+++ b/libappstream-glib/as-utils.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)
diff --git a/libappstream-glib/as-version.c b/libappstream-glib/as-version.c
index 58eb395..0e86c00 100644
--- a/libappstream-glib/as-version.c
+++ b/libappstream-glib/as-version.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-version.h.in b/libappstream-glib/as-version.h.in
index 9b93b2a..6cc6bde 100644
--- a/libappstream-glib/as-version.h.in
+++ b/libappstream-glib/as-version.h.in
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 /**
diff --git a/libappstream-glib/as-yaml.c b/libappstream-glib/as-yaml.c
index 81ccdfb..d764d15 100644
--- a/libappstream-glib/as-yaml.c
+++ b/libappstream-glib/as-yaml.c
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #include "config.h"
diff --git a/libappstream-glib/as-yaml.h b/libappstream-glib/as-yaml.h
index cf9cc3c..735d8a2 100644
--- a/libappstream-glib/as-yaml.h
+++ b/libappstream-glib/as-yaml.h
@@ -2,21 +2,7 @@
  *
  * Copyright (C) 2014 Richard Hughes <richard@hughsie.com>
  *
- * Licensed under the GNU Lesser General Public License Version 2.1
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * SPDX-License-Identifier: LGPL-2.1+
  */
 
 #if !defined (__APPSTREAM_GLIB_H) && !defined (AS_COMPILATION)