diff --git a/_layouts/default.html b/_layouts/default.html
index 8ec5649..873b82a 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -42,5 +42,15 @@ <h3 style="margin-right: 145px;">Resources</h3>
       </footer>
     </div>
     <script src="{{ "/assets/js/scale.fix.js" | relative_url }}"></script>
+    {% if site.google_analytics %}
+    <!-- Global site tag (gtag.js) - Google Analytics -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+      gtag('config', '{{ site.google_analytics }}');
+    </script>
+    {% endif %}
   </body>
 </html>