diff --git a/_config.yml b/_config.yml
index de240d7..4cdc12a 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,4 +1,4 @@
 theme: jekyll-theme-minimal
 title: Hua Zhou Homepage
-google_analytics: G-KVD5Y9ZGRB
+google_analytics: UA-42646483-1
 url: http://hua-zhou.github.io
diff --git a/_layouts/course.html b/_layouts/course.html
index db691bf..71eda52 100644
--- a/_layouts/course.html
+++ b/_layouts/course.html
@@ -13,14 +13,16 @@
     <![endif]-->
 
     <!-- Google tag (gtag.js) -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id=G-KVD5Y9ZGRB"></script>
-    <script>
-    window.dataLayer = window.dataLayer || [];
-    function gtag(){dataLayer.push(arguments);}
-    gtag('js', new Date());
-
-    gtag('config', 'G-KVD5Y9ZGRB');
-    </script>
+        <script>
+            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+             m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+             })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+            
+            ga('create', 'UA-42646483-1', 'hua-zhou.github.io');
+            ga('send', 'pageview');
+            
+        </script>
         
   </head>
   
diff --git a/_layouts/default.html b/_layouts/default.html
index 678b846..e19b7ee 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -13,14 +13,17 @@
     <![endif]-->
 
     <!-- Google tag (gtag.js) -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id=G-KVD5Y9ZGRB"></script>
-    <script>
-    window.dataLayer = window.dataLayer || [];
-    function gtag(){dataLayer.push(arguments);}
-    gtag('js', new Date());
+        <script>
+            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+             m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+             })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+            
+            ga('create', 'UA-42646483-1', 'hua-zhou.github.io');
+            ga('send', 'pageview');
+            
+        </script>
 
-    gtag('config', 'G-KVD5Y9ZGRB');
-    </script>        
   </head>
   
   <body>
diff --git a/_layouts/post_teaching.html b/_layouts/post_teaching.html
index 061cbc6..5845283 100644
--- a/_layouts/post_teaching.html
+++ b/_layouts/post_teaching.html
@@ -13,13 +13,15 @@
     <![endif]-->
 
         <!-- Google tag (gtag.js) -->
-        <script async src="https://www.googletagmanager.com/gtag/js?id=G-KVD5Y9ZGRB"></script>
         <script>
-        window.dataLayer = window.dataLayer || [];
-        function gtag(){dataLayer.push(arguments);}
-        gtag('js', new Date());
-
-        gtag('config', 'G-KVD5Y9ZGRB');
+            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+             m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+             })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+            
+            ga('create', 'UA-42646483-1', 'hua-zhou.github.io');
+            ga('send', 'pageview');
+            
         </script>
 
 		<script type="text/x-mathjax-config">
