diff --git a/_layouts/default.html b/_layouts/default.html
index ff9da6de..dbb6a2d7 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -82,5 +82,11 @@
   <script src="/js/prism.js"></script>
   <script src="/js/prism.ruby.js"></script>
   <a href="https://github.com/capistrano/capistrano"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_white_ffffff.png" alt="Fork me on GitHub"></a>
+  <!-- Google Tag Manager -->
+  <noscript>
+    <iframe src="//www.googletagmanager.com/ns.html?id=GTM-KLDBJG" height="0" width="0" style="display:none;visibility:hidden"></iframe>
+  </noscript>
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-KLDBJG');</script>
+  <!-- End Google Tag Manager -->
 </body>
 </html>