diff --git a/AUTHORS b/AUTHORS
index 3a056a9..2430eed 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -5,6 +5,7 @@ alphabetical order):
 - Alexey Bazhin
 - Andreas Sieferlinger
 - Antoine Pitrou
+- Brent Bandelgar (@brentbb)
 - Cédric Bosdonnat
 - Christophe-Marie Duquesne
 - @datro
diff --git a/sigal/settings.py b/sigal/settings.py
index a384bd6..416fb91 100644
--- a/sigal/settings.py
+++ b/sigal/settings.py
@@ -39,6 +39,7 @@ _DEFAULT_CONFIG = {
     'destination': '_build',
     'files_to_copy': (),
     'google_analytics': '',
+    'google_tag_manager': '',   
     'ignore_directories': [],
     'ignore_files': [],
     'img_processor': 'ResizeToFit',
diff --git a/sigal/templates/sigal.conf.py b/sigal/templates/sigal.conf.py
index a733ecc..de39bd0 100644
--- a/sigal/templates/sigal.conf.py
+++ b/sigal/templates/sigal.conf.py
@@ -171,6 +171,9 @@ ignore_files = []
 # Google Analytics tracking code (UA-xxxx-x)
 # google_analytics = ''
 
+# Google Tag Manager tracking code (GTM-xxxxxx)
+# google_tag_manager = ''
+
 # Piwik tracking
 # tracker_url must not contain trailing slash.
 # Example : {'tracker_url': 'http://stats.domain.com', 'site_id' : 2}
diff --git a/sigal/themes/colorbox/templates/base.html b/sigal/themes/colorbox/templates/base.html
index fe9d226..86d8227 100644
--- a/sigal/themes/colorbox/templates/base.html
+++ b/sigal/themes/colorbox/templates/base.html
@@ -18,8 +18,10 @@
     </style>
     {% endif %}
     {% endblock %}
+    {% include 'analytics.html' %}
   </head>
   <body>
+    {% include 'gtm.html' %}
     <div class="container">
       <div class="four columns">
         <div class="sidebar">
@@ -45,7 +47,6 @@
     </div>
 
     {% block footer %}{% endblock %}
-    {% include 'analytics.html' %}
     {% include 'piwik.html' %}
   </body>
 </html>
diff --git a/sigal/themes/default/templates/analytics.html b/sigal/themes/default/templates/analytics.html
index 889a824..ba2e6f9 100644
--- a/sigal/themes/default/templates/analytics.html
+++ b/sigal/themes/default/templates/analytics.html
@@ -1,13 +1,12 @@
 {% if settings.google_analytics %}
     <script>
-    var _gaq = _gaq || [];
-    _gaq.push(['_setAccount', '{{ settings.google_analytics }}']);
-    _gaq.push(['_trackPageview']);
+     (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');
 
-    (function() {
-        var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
-        ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
-        var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
-    })();
-    </script>
+     ga('create', '{{ settings.google_analytics }}', 'auto');
+     ga('send', 'pageview');
+
+	</script>
 {% endif %}
diff --git a/sigal/themes/default/templates/gtm.html b/sigal/themes/default/templates/gtm.html
new file mode 100644
index 0000000..f4f2c3c
--- /dev/null
+++ b/sigal/themes/default/templates/gtm.html
@@ -0,0 +1,11 @@
+{% if settings.google_tag_manager %}
+<!-- Google Tag Manager -->
+<noscript><iframe src="//www.googletagmanager.com/ns.html?id={{settings.google_tag_manager}}"
+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','{{settings.google_tag_manager}}');</script>
+<!-- End Google Tag Manager -->
+{% endif %}
diff --git a/sigal/themes/galleria/templates/index.html b/sigal/themes/galleria/templates/index.html
index 6046469..ad23537 100644
--- a/sigal/themes/galleria/templates/index.html
+++ b/sigal/themes/galleria/templates/index.html
@@ -27,8 +27,10 @@
     <style type="text/css">
     </style>
     {% endif %}
+    {% include 'analytics.html' %}
   </head>
   <body>
+    {% include 'gtm.html' %}
     <div class="container">
       <header>
         <h1><a href="{{ album.index_url }}">{{ index_title }}</a></h1>
@@ -303,7 +305,6 @@
 
     </script>
     {% endif %}
-    {% include 'analytics.html' %}
     {% include 'piwik.html' %}
   </body>
 </html>
diff --git a/sigal/themes/photoswipe/templates/index.html b/sigal/themes/photoswipe/templates/index.html
index bc85964..557d910 100644
--- a/sigal/themes/photoswipe/templates/index.html
+++ b/sigal/themes/photoswipe/templates/index.html
@@ -14,8 +14,10 @@
     <script src="{{ theme.url }}/photoswipe-ui-default.min.js"></script>
     <script src="{{ theme.url }}/echo/echo.min.js"></script>
     {% endblock %}
+    {% include 'analytics.html' %}
   </head>
   <body>
+  {% include 'gtm.html' %}
   <div class="container">
 	<h1><a href="{{ album.index_url }}">{{ index_title }}</a></h1>
 
@@ -396,7 +398,6 @@
 	  {% endif %}
 	{% endblock %}
 </div>
-{% include 'analytics.html' %}
 {% include 'piwik.html' %}
 </body>
 </html>
