diff --git a/_layouts/default.html b/_layouts/default.html
index ea1ffa8..5323ed0 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -10,7 +10,13 @@
   <link rel="stylesheet" href="{{ '/assets/main.css' | relative_url }}">
   <link rel="canonical" href="{{ page.url | replace:'index.html','' | absolute_url }}">
 </head>
-<body class="bg-light">
+  <!-- Google Tag Manager -->
+<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=
+'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+})(window,document,'script','dataLayer','GTM-WMZFQDSZ');</script>
+<!-- End Google Tag Manager --><body class="bg-light">
   {% include header.html %}
   <main class="main pt-5">
     {{ content }}
@@ -19,6 +25,10 @@
 
   </footer>
 </body>
+  <!-- Google Tag Manager (noscript) -->
+<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WMZFQDSZ"
+height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+<!-- End Google Tag Manager (noscript) -->  
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.min.js" integrity="sha384-ODmDIVzN+pFdexxHEHFBQH3/9/vQ9uori45z4JjnFsRydbmQbmL5t1tQ0culUzyK" crossorigin="anonymous"></script>
 <script src="https://unpkg.com/cart-localstorage@1.1.4/dist/cart-localstorage.min.js" type="text/javascript"></script>
 <script src="{{ '/assets/javascript/index.js' | relative_url }}" type="text/javascript"></script>
