diff --git a/doc/common/conf.py b/doc/common/conf.py
index 5848391..e74adee 100644
--- a/doc/common/conf.py
+++ b/doc/common/conf.py
@@ -135,6 +135,7 @@ if ON_RTD:
         'css_files': [
             'https://media.readthedocs.org/css/sphinx_rtd_theme.css',
             'https://media.readthedocs.org/css/readthedocs-doc-embed.css',
+            '_static/contentui.css',
             '_static/css/theme_overrides.css',
         ],
         'disclaimer': _DISCLAIMER,