diff --git a/js/plugins.js b/js/plugins.js
index 4bdb710..b7e7c4f 100644
--- a/js/plugins.js
+++ b/js/plugins.js
@@ -33,7 +33,7 @@ var urlRegexp = /(?:(?:https?|ftp):\/\/|www\.|ftp\.)\S*[^\s.;,(){}<>]/g;
 var UrlPlugin = function(name, urlCallback) {
     return {
         contentForMessage: function(message) {
-            var urls = message.match(urlRegexp);
+            var urls = _.uniq(message.match(urlRegexp));
             var content = [];
 
             for (var i = 0; urls && i < urls.length; i++) {
diff --git a/test/karma.conf.js b/test/karma.conf.js
index 8bafa0c..43c86e7 100644
--- a/test/karma.conf.js
+++ b/test/karma.conf.js
@@ -9,6 +9,7 @@ module.exports = function(config){
       'bower_components/angular-mocks/angular-mocks.js',
       'bower_components/angular-sanitize/angular-sanitize.js',
       'bower_components/angular-touch/angular-touch.js',
+      'bower_components/underscore/underscore.js',
       'js/localstorage.js',
       'js/weechat.js',
       'js/irc-utils.js',