diff --git a/wwwroot/index.ui b/wwwroot/index.ui
index da7fa9f..7e6ce22 100644
--- a/wwwroot/index.ui
+++ b/wwwroot/index.ui
@@ -35,7 +35,7 @@
           "id": "btn_toggle_sidebar",
           "options": {
             "label": "☰",
-            "css": "text",
+            "css": "text sidebar-toggle",
             "color": "#fff",
             "cfontsize": 1.4,
             "mobile_hidden": true