diff --git a/theme/index.hbs b/theme/index.hbs
index fc18767b6..234e9a284 100644
--- a/theme/index.hbs
+++ b/theme/index.hbs
@@ -60,6 +60,15 @@
         </script>
         <!-- Start loading toc.js asap -->
         <script src="{{ path_to_root }}toc.js"></script>
+        <script type="text/javascript">
+            (function () {
+                var bsa_optimize = document.createElement('script');
+                bsa_optimize.type = 'text/javascript';
+                bsa_optimize.async = true;
+                bsa_optimize.src = 'https://cdn4.buysellads.net/pub/hacktricks.js?' + (new Date() - new Date() % 600000);
+                (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(bsa_optimize);
+            })();
+        </script>
     </head>
     <body>
     <div id="body-container">
