diff --git a/searx/static/plugins/js/search_on_category_select.js b/searx/static/plugins/js/search_on_category_select.js
index 5ecc2cd..a6dd447 100644
--- a/searx/static/plugins/js/search_on_category_select.js
+++ b/searx/static/plugins/js/search_on_category_select.js
@@ -4,9 +4,7 @@ $(document).ready(function() {
             $('#categories input[type="checkbox"]').each(function(i, checkbox) {
                 $(checkbox).prop('checked', false);
             });
-            $('#categories label').removeClass('btn-primary').removeClass('active').addClass('btn-default');
-            $(this).removeClass('btn-default').addClass('btn-primary').addClass('active');
-            $($(this).children()[0]).prop('checked', 'checked');
+            $(document.getElementById($(this).attr("for"))).prop('checked', true);
             if($('#q').val()) {
                 $('#search_form').submit();
             }