1 files changed, 2 insertions, 2 deletions
diff --git a/setup.py b/setup.py
index 206ff4ad4..4a1d5aeed 100644
--- a/setup.py
+++ b/setup.py
@@ -18,8 +18,8 @@ install_requires = [
     'sphinxcontrib-applehelp',
     'sphinxcontrib-devhelp',
     'sphinxcontrib-jsmath',
-    'sphinxcontrib-htmlhelp',
-    'sphinxcontrib-serializinghtml',
+    'sphinxcontrib-htmlhelp>=2.0.0',
+    'sphinxcontrib-serializinghtml>=1.1.5',
     'sphinxcontrib-qthelp',
     'Jinja2>=2.3',
     'Pygments>=2.0',