diff --git a/docs/conf.py b/docs/conf.py
index f5d7c244..7061e8a9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -29,7 +29,8 @@ extensions = [
     'sphinx.ext.intersphinx',
     'sphinx.ext.coverage',
     'sphinx.ext.viewcode',
-    'sphinx.ext.pngmath',
+    'sphinx.ext.imgmath',
+    'sphinxcontrib.cheeseshop',
     'githubsphinx',
 ]
 
diff --git a/requirements/docs.txt b/requirements/docs.txt
index ec809083..8be782f1 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -1,3 +1,4 @@
 Sphinx>=1.4
+sphinxcontrib-cheeseshop
 Django
 -r extras/mongodb.txt