--- a/sphinx/source/conf.py
+++ b/sphinx/source/conf.py
@@ -35,7 +35,6 @@
     'renpydoc',
     'sphinx.ext.intersphinx',
     'sphinx_rtd_theme',
-    'sphinx_rtd_dark_mode',
     ]
 
 # Add any paths that contain templates here, relative to this directory.
