diff --git a/doc/python/sphinx/_static/custom.css b/doc/python/sphinx/_static/custom.css
index d961c389b9e..34a31a9926f 100644
--- a/doc/python/sphinx/_static/custom.css
+++ b/doc/python/sphinx/_static/custom.css
@@ -1,3 +1,8 @@
 dl.field-list > dt {
     word-break: keep-all !important;
 }
+.sphinxsidebar {
+    overflow-y: scroll;
+    top: 0;
+    bottom: 0;
+}