diff --git a/Doc/conf.py b/Doc/conf.py
index c1b07df08b1782..d69c560f367a09 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -38,6 +38,7 @@
     'sphinx.ext.coverage',
     'sphinx.ext.doctest',
     'sphinx.ext.extlinks',
+    'sphinx.ext.imgconverter',
 ]
 
 # Skip if downstream redistributors haven't installed them