diff --git a/docs/_layouts/default.html b/docs/_layouts/default.html
index db951fc4..2b59a2a3 100644
--- a/docs/_layouts/default.html
+++ b/docs/_layouts/default.html
@@ -2,6 +2,14 @@
 <html lang="en">
 <head>
     <meta charset="utf-8">
+    <!-- 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-WRVT65');</script>
+    <!-- End Google Tag Manager -->
     {% seo %}
     <link rel="canonical" href="{{site.cannonicalBase}}{{page.url}}" />
     <meta name="giscus:backlink" content="{{site.cannonicalBase}}{{page.url}}">
@@ -10,22 +18,19 @@
     <script src="https://kit.fontawesome.com/3e6b2f4808.js" crossorigin="anonymous"></script>
     <link rel="stylesheet" href="{{site.baseurl}}/assets/css/main.css">
     <link href="{{site.baseurl}}/assets/css/base16.css" rel="stylesheet" />
-    <!-- Google tag (gtag.js) -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id=G-44XG57BE28"></script>
-    <script>
-        window.dataLayer = window.dataLayer || [];
-        function gtag() { dataLayer.push(arguments); }
-        gtag('js', new Date());
-        gtag('config', 'G-44XG57BE28');
-
-    </script>
 </head>
 <body>
-    {%- include header.html -%} 
+    <!-- Google Tag Manager (noscript) -->
+    <noscript>
+        <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WRVT65"
+                height="0" width="0" style="display:none;visibility:hidden"></iframe>
+    </noscript>
+    <!-- End Google Tag Manager (noscript) -->
+    {%- include header.html -%}
     <div class="mainContainer">
         <div class="container-flow mt-5 m-5 d-flex mb-3">
             <div class="p-2 justify-content-end d-none d-lg-block">
-                {%- include sidebar.html -%} 
+                {%- include sidebar.html -%}
             </div>
             <div class="p-2 flex-grow-1">
                 <article>
@@ -84,11 +89,12 @@
                                     </li>
                                     <li class="list-group-item">
                                         <i class="fab fa-twitter"></i>
-                                        <a href="https://preview.nkdagility.com/learn/azure-devops-migration-tools{{page.url}}" rel="nofollow noindex" class="ml-2" target="_blank">Preview</a> (<a href="https://blue-river-093197403-preview.westeurope.5.azurestaticapps.net{{page.url}}" rel="nofollow noindex" class="ml-2" target="_blank">without AFD</a>)</li>
+                                        <a href="https://preview.nkdagility.com/learn/azure-devops-migration-tools{{page.url}}" rel="nofollow noindex" class="ml-2" target="_blank">Preview</a> (<a href="https://blue-river-093197403-preview.westeurope.5.azurestaticapps.net{{page.url}}" rel="nofollow noindex" class="ml-2" target="_blank">without AFD</a>)
+                                    </li>
                                 </ul>
                             </li>
                         </ul>
-                        
+
                     </div>
                 </div>
                 <div class="card mb-3">
@@ -137,7 +143,7 @@ <h5 class="no_toc card-header">In this article</h5>
 
         </div>
     </div>
-   {%- include footer.html -%}
+    {%- include footer.html -%}
 </body>
 </html>
 
