diff --git a/doc/conf.py.in b/doc/conf.py.in
index a7656ea9..3a39d925 100644
--- a/doc/conf.py.in
+++ b/doc/conf.py.in
@@ -13,6 +13,7 @@ extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
               'sphinx.ext.autosummary',
+              'sphinx.ext.githubpages',
               'matplotlib.sphinxext.plot_directive',
               'autorun',
               'numpydoc']