diff --git a/lib/components/SideMenu/side-menu.ts b/lib/components/SideMenu/side-menu.ts
index 3a6bc0fcd7..63a36c5968 100644
--- a/lib/components/SideMenu/side-menu.ts
+++ b/lib/components/SideMenu/side-menu.ts
@@ -21,10 +21,9 @@ const global = window;
         style({ height: '0px' })),
       state('expanded',
         style({ height: '*' })),
-      // https://github.com/Rebilly/ReDoc/issues/162
-      // transition('collapsed <=> expanded', [
-      //   animate('200ms ease')
-      // ])
+      transition('collapsed <=> expanded', [
+        animate('200ms ease')
+      ])
     ])
   ],
 })