diff --git a/conf.py b/conf.py
index b1aa97d..0b0ca3f 100644
--- a/conf.py
+++ b/conf.py
@@ -30,6 +30,7 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+petljadoc.runestone_ext.add_module('blockpylib')
 extensions = ['sphinx.ext.mathjax'] + runestone_extensions() + petljadoc.runestone_ext.extensions()
 
 #,'runestone.video','runestone.reveal','runestone.poll','runestone.tabbedStuff','runestone.disqus','runestone.codelens','runestone.activecode', 'runestone.assess', 'runestone.animation','runestone.meta', 'runestone.parsons', 'runestone.blockly', 'runestone.livecode','runestone.accessibility']