diff --git a/src/index.pug b/src/index.pug
index c72f8898..7d0df658 100644
--- a/src/index.pug
+++ b/src/index.pug
@@ -2,7 +2,13 @@
 
 doctype html
 html(lang='en')
-  head
+  head 
+    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-TZDLZX82');
     title #{data.title} - #{data.description}
     meta(charset='utf-8')
     meta(name='description' content=data.description)
@@ -27,17 +33,13 @@ html(lang='en')
     meta(name='viewport' content='width=device-width, initial-scale=1, maximum-scale=5') 
     meta(name='theme-color' content=data.theme_color)
     link(rel='shortcut icon' type='image/favicon' href='favicon.ico')   
-    script(async src='https://www.googletagmanager.com/gtag/js?id=' + data.ga)
-    script.
-      window.dataLayer = window.dataLayer || [];
-      function gtag(){dataLayer.push(arguments);}
-      gtag('js', new Date()); 
-      gtag('config', '#{data.ga}');  
     style.
       body {
         visibility: hidden;
       } 
-  body   
+  body    
+    noscript 
+      iframe(src='https://www.googletagmanager.com/ns.html?id=GTM-TZDLZX82' height='0' width='0' style='display:none;visibility:hidden')
     section.header
       .piano
         .piano-key