diff --git a/docs/reST/conf.py b/docs/reST/conf.py
index 92f8a9b..17480cb 100644
--- a/docs/reST/conf.py
+++ b/docs/reST/conf.py
@@ -24,7 +24,7 @@ sys.path.append(os.path.abspath('.'))
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.doctest',
               'sphinx.ext.coverage', 'ext.headers', 'ext.boilerplate',
-              'ext.customversion', 'ext.edit_on_github']
+              'ext.edit_on_github']
 
 
 # Add any paths that contain templates here, relative to this directory.