diff --git a/src/collective/solr/browser/resources/scripts.js b/src/collective/solr/browser/resources/scripts.js
index d8b8e4e..0339f2d 100644
--- a/src/collective/solr/browser/resources/scripts.js
+++ b/src/collective/solr/browser/resources/scripts.js
@@ -1,9 +1,10 @@
+/*jshint strict: true, undef: true, unused: true*/
+/*global $,jQuery*/
 /* use `collective.js.showmore` to hide facet counts via jquery */
-(function($) {
-$(function() {
-    $('#portal-searchfacets dl').showMore({
-        expression: 'dt:gt(4), dd:gt(4)',
-        grace_count: 2
-    });
-});
-})(jQuery);
\ No newline at end of file
+(function ($) {
+  "use strict";
+  $('#portal-searchfacets dl').showMore({
+    expression: 'dt:gt(4), dd:gt(4)',
+    grace_count: 2
+  });
+}(jQuery));