diff --git a/Site/2013-05/index.html b/Site/2013-05/index.html
index d136afed..d47a7218 100644
--- a/Site/2013-05/index.html
+++ b/Site/2013-05/index.html
@@ -133,6 +133,19 @@
         <script src="js/plugins.js"></script>
         <script src="js/main.js"></script>
 
+        <!-- Internet Defense League -->
+        <script type="text/javascript">
+            window._idl = {};
+            _idl.variant = "banner";
+            (function() {
+                var idl = document.createElement('script');
+                idl.type = 'text/javascript';
+                idl.async = true;
+                idl.src = ('https:' == document.location.protocol ? 'https://' : 'http://') + 'members.internetdefenseleague.org/include/?url=' + (_idl.url || '') + '&campaign=' + (_idl.campaign || '') + '&variant=' + (_idl.variant || 'banner');
+                document.getElementsByTagName('body')[0].appendChild(idl);
+            })();
+        </script>
+
         <!-- Google Analytics -->
         <script>
             var _gaq=[['_setAccount','UA-90535-15'],['_trackPageview']];