diff --git a/package.json b/package.json
index 33bf5f43..52ec5ddd 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,8 @@
     "karma-coverage": "~0.2.3",
     "karma-phantomjs-launcher": "^0.1.4",
     "karma-chrome-launcher": "^0.1.4",
+    "karma-firefox-launcher": "~0.1.3",
+    "karma-safari-launcher": "~0.1.1",
     "tin": "^0.5.0",
     "copyfiles": "0.1.0"
   },
diff --git a/spec/karma.conf.js b/spec/karma.conf.js
index 703c506b..d287ddac 100644
--- a/spec/karma.conf.js
+++ b/spec/karma.conf.js
@@ -22,7 +22,9 @@ module.exports = function (config) {
 			'karma-mocha',
 			'karma-coverage',
 			'karma-phantomjs-launcher',
-			'karma-chrome-launcher'],
+			'karma-chrome-launcher',
+			'karma-safari-launcher',
+			'karma-firefox-launcher'],
 
 		// frameworks to use
 		frameworks: ['mocha'],