diff --git a/_includes/head.html b/_includes/head.html
index ec3e1c5..4b4bdad 100755
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -6,4 +6,13 @@
     <script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.imagesloaded/4.1.4/imagesloaded.pkgd.min.js" crossorigin="anonymous"></script>
     <link rel="shortcut icon" href="{% if site.favicon-url %}{{site.favicon-url}}{% else %}{{ 'assets/images/builtinruby_logo.svg' | absolute_url }}{% endif %}" type="image/x-icon">
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-2KL4P15L2X"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+
+      gtag('config', 'G-2KL4P15L2X');
+    </script>
 </head>
\ No newline at end of file