diff --git a/templates/partial/gtm.html b/templates/partial/gtm.html
index d86382d..3c57902 100644
--- a/templates/partial/gtm.html
+++ b/templates/partial/gtm.html
@@ -5,7 +5,7 @@
     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='//www.googletagmanager.com/gtm.js?id='+i+dl;
+    j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;
     f.parentNode.insertBefore(j,f);
   })(window,document,'script','dataLayer','{{ GOOGLE_TAG_MANAGER }}');
 </script>