diff --git a/lib/axios.js b/lib/axios.js
index 6a6a551..57b770e 100644
--- a/lib/axios.js
+++ b/lib/axios.js
@@ -5,16 +5,6 @@ var utils = require('./utils');
 var dispatchRequest = require('./core/dispatchRequest');
 var InterceptorManager = require('./core/InterceptorManager');
 
-// Polyfill ES6 Promise if needed
-(function () {
-  // webpack is being used to set es6-promise to the native Promise
-  // for the standalone build. It's necessary to make sure polyfill exists.
-  var P = require('es6-promise');
-  if (P && typeof P.polyfill === 'function') {
-    P.polyfill();
-  }
-})();
-
 var axios = module.exports = function axios(config) {
   config = utils.merge({
     method: 'get',
diff --git a/package.json b/package.json
index ad9131a..79e143b 100644
--- a/package.json
+++ b/package.json
@@ -26,11 +26,9 @@
     "url": "https://github.com/mzabriskie/axios/issues"
   },
   "homepage": "https://github.com/mzabriskie/axios",
-  "dependencies": {
-    "es6-promise": "^2.3.0"
-  },
   "devDependencies": {
     "coveralls": "^2.11.2",
+    "es6-promise": "^2.3.0",
     "grunt": "^0.4.5",
     "grunt-banner": "^0.4.0",
     "grunt-contrib-clean": "^0.6.0",
diff --git a/test/specs/promise.spec.js b/test/specs/promise.spec.js
index 36b9c64..5dd5088 100644
--- a/test/specs/promise.spec.js
+++ b/test/specs/promise.spec.js
@@ -1,3 +1,4 @@
+require('es6-promise').polyfill();
 var axios = require('../../index');
 
 describe('promise', function () {