1 files changed, 1 insertions, 1 deletions
diff --git a/gmpxx.h b/gmpxx.h
index f5fbda298..b8807e0b9 100644
--- a/gmpxx.h
+++ b/gmpxx.h
@@ -15,7 +15,7 @@ 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 the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+along with the GNU MP Library.  If not, see https://www.gnu.org/licenses/.  */
 
 #ifndef __GMP_PLUSPLUS__
 #define __GMP_PLUSPLUS__