--- a/docs/conf.py
+++ b/docs/conf.py
@@ -32,7 +32,7 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.mathjax'
+    'sphinx.ext.mathjax', 'sphinx.ext.autodoc'
 ]
 
 # Add any paths that contain templates here, relative to this directory.
