diff --git a/src/sass/ng-admin.scss b/src/sass/ng-admin.scss
index fd66a1c3..50266312 100644
--- a/src/sass/ng-admin.scss
+++ b/src/sass/ng-admin.scss
@@ -33,12 +33,12 @@ menu {
 ul.collapsible.collapsed {
     max-height: 0;
     transition: max-height 0.15s ease-out;
-    overflow: hidden;
 }
 
 ul.collapsible {
     max-height: 500px;
     transition: max-height 0.25s ease-in;
+    overflow-y: hidden;
 }
 
 [ng-click],