diff --git a/docs/header.html b/docs/header.html
index da861c78e8..be64c48634 100644
--- a/docs/header.html
+++ b/docs/header.html
@@ -2,6 +2,16 @@
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-SY496B9L99"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-SY496B9L99');
+</script>
+ 
 <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
 <meta http-equiv="X-UA-Compatible" content="IE=9"/>
 <meta name="generator" content="Doxygen $doxygenversion"/>
diff --git a/docs/index.html b/docs/index.html
index 398f8feb96..f7867e2074 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,6 +1,16 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-SY496B9L99"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+    
+      gtag('config', 'G-SY496B9L99');
+    </script>
+    
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
