diff --git a/doc/source/conf.py b/doc/source/conf.py
index 7c0d587..38c1689 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -29,6 +29,7 @@
     'sphinx.ext.autodoc',
     'sphinxcontrib.blockdiag',
     'sphinxcontrib.programoutput',
+    'zuul.sphinx.ansible',
     'zuul.sphinx.zuul',
 ]
 #extensions = ['sphinx.ext.intersphinx']