diff --git a/src/Whoops/Resources/js/whoops.base.js b/src/Whoops/Resources/js/whoops.base.js
index a67e809..ed3db16 100644
--- a/src/Whoops/Resources/js/whoops.base.js
+++ b/src/Whoops/Resources/js/whoops.base.js
@@ -119,4 +119,10 @@ Zepto(function($) {
     e.preventDefault();
     $.get(this.href);
   });
+
+  // Symfony VarDumper: Close the by default expanded objects
+  $('.sf-dump-expanded')
+    .removeClass('sf-dump-expanded')
+    .addClass('sf-dump-compact');
+  $('.sf-dump-toggle span').html('▶');
 });