diff --git a/static/js/patoroco.js b/static/js/patoroco.js
new file mode 100644
index 0000000..4a2c162
--- /dev/null
+++ b/static/js/patoroco.js
@@ -0,0 +1,18 @@
+/*
+Open external links in a new tab.
+Copied from: http://mitchbarry.com/handling-external-links/
+*/
+(function() {
+    var hostname = window.location.hostname;
+    var new_tab = true;
+    var set_icon = true;
+    for (var links = document.links, i = 0, a; a = links[i]; i++) {
+        if (a.hostname !== hostname) {
+            if (new_tab)
+                a.target = '_blank';
+            if (set_icon)
+                a.innerHTML +=
+                    '<i class="fa fa-external-link fa-1 external-link-margin" />';
+        }
+    }
+})();
\ No newline at end of file
diff --git a/templates/base.html b/templates/base.html
index cbbea97..7e2392f 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -205,5 +205,7 @@
   {% if GITHUB_CORNER_URL %}
   {% include 'partial/github.html' %}
   {% endif %}
+
+  <script type="text/javascript" src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/js/patoroco.js" async="async"></script>
 </body>
 </html>