diff --git a/karma.js b/karma.js
index c7d6546..bb37889 100644
--- a/karma.js
+++ b/karma.js
@@ -7,6 +7,7 @@ module.exports = function(config) {
     ],
     colors: true,
     files: [
+      'node_modules/polyfill-function-prototype-bind/bind.js',
       'build/*.js',
       'test/*.js'
     ],
diff --git a/package.json b/package.json
index 46a31d9..682afa9 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
     "karma-jasmine": "^0.3.2",
     "karma-phantomjs-launcher": "^0.1.4",
     "karma-story-reporter": "^0.2.2",
+    "polyfill-function-prototype-bind": "0.0.1",
     "uglify-js": "^2.4.16",
     "watch": "^0.13.0"
   },