diff --git a/doc/source/_themes/sphinx13/ga.html b/doc/source/_themes/sphinx13/ga.html
new file mode 100644
index 0000000..2d6044e
--- /dev/null
+++ b/doc/source/_themes/sphinx13/ga.html
@@ -0,0 +1,10 @@
+<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','https://www.google-analytics.com/analytics.js','ga');
+
+  ga('create', 'UA-27448879-1', 'auto');
+  ga('send', 'pageview');
+
+</script>
diff --git a/doc/source/_themes/sphinx13/gtm.html b/doc/source/_themes/sphinx13/gtm.html
new file mode 100644
index 0000000..d7a69fc
--- /dev/null
+++ b/doc/source/_themes/sphinx13/gtm.html
@@ -0,0 +1,9 @@
+<!-- Google Tag Manager -->
+<noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-5JKNCP"
+height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+<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=
+'//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+})(window,document,'script','dataLayer','GTM-5JKNCP');</script>
+<!-- End Google Tag Manager -->
diff --git a/doc/source/_themes/sphinx13/layout.html b/doc/source/_themes/sphinx13/layout.html
index 407318e..8905780 100644
--- a/doc/source/_themes/sphinx13/layout.html
+++ b/doc/source/_themes/sphinx13/layout.html
@@ -65,6 +65,7 @@
 {% endblock %}
 
 {% block header %}
+{% include "gtm.html" %}
 <div class="pageheader">
   <ul>
     <li><a href="{{ pathto('about') }}">About</a></li>