diff --git a/docs/_templates/layout.html b/docs/_templates/layout.html
index 41713a109..498c0e6e9 100644
--- a/docs/_templates/layout.html
+++ b/docs/_templates/layout.html
@@ -2,5 +2,9 @@
 
 {% block menu %}
     {{ super() }}
-    <a href="{{ pathto('genindex') }}">Keyword Index</a>
+    <ul>
+        <li>
+            <a href="{{ pathto('genindex') }}">Keyword Index</a>
+        </li>
+    </ul>
 {% endblock %}