diff --git a/docs/conf.py b/docs/conf.py
index a149171..455b579 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -45,6 +45,7 @@
     'sphinx.ext.mathjax',
     'sphinx.ext.ifconfig',
     'sphinx.ext.githubpages',
+    'sphinxcontrib_verilog_diagrams',
 ]
 
 # Add any paths that contain templates here, relative to this directory.