diff --git a/index.js b/index.js
index 5d1ca37..8fbfef8 100644
--- a/index.js
+++ b/index.js
@@ -3,7 +3,15 @@
  */
 
 import {NativeModules, NativeAppEventEmitter} from 'react-native';
-import promisify from 'es6-promisify';
+
+function promisify(fn, handler) {
+  return function (...args) {
+    return new Promise(function (resolve, reject) {
+      fn(...args, handler.bind({ resolve, reject }))
+    })
+  }
+}
+
 
 const {WeiboAPI} = NativeModules;
 
diff --git a/package.json b/package.json
index 5bc592b..d94cc3d 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,5 @@
     "url": "https://github.com/reactnativecn/react-native-weibo/issues"
   },
   "homepage": "https://github.com/reactnativecn/react-native-weibo#readme",
-  "dependencies": {
-    "es6-promisify": "^3.0.0"
-  }
+  "dependencies": {}
 }