diff --git a/doc/source/conf.py b/doc/source/conf.py
index 6e2e107..f6a19fa 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -4,7 +4,7 @@
 #
 # This file does only contain a selection of the most common options. For a
 # full list see the documentation:
-# http://www.sphinx-doc.org/en/stable/config
+# http://www.sphinx-doc.org/en/stable/config.html
 
 # -- Path setup --------------------------------------------------------------