diff --git a/couchpotato/core/plugins/userscript/template.js b/couchpotato/core/plugins/userscript/template.js
index 090a62ba..e200afb0 100644
--- a/couchpotato/core/plugins/userscript/template.js
+++ b/couchpotato/core/plugins/userscript/template.js
@@ -12,6 +12,9 @@
 
 // ==/UserScript==
 
+if (window.top != window.self)  // Only run on top window
+    return;
+
 var version = {{version}},
     host = '{{host}}',
     api = '{{api}}';