diff --git a/stylesheets/sidebar.scss b/stylesheets/sidebar.scss
index df176ca31f..723334cef7 100644
--- a/stylesheets/sidebar.scss
+++ b/stylesheets/sidebar.scss
@@ -89,7 +89,7 @@
   transition: color 0.2s ease;
 }
 
-summary {
+.sidebar-category summary {
   list-style: none;
 }
 summary::-webkit-details-marker {