diff --git a/README.md b/README.md
index dc4bcf8..980b47e 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,8 @@
 ## 安装
 
 ```sh
-$ npm install react-native-wechat-lib --save
+npm install react-native-wechat-lib --save
+react-native link react-native-wechat-lib
 ```
 
 ## 起步
diff --git a/index.d.ts b/index.d.ts
index e00de4c..bde08d0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -23,6 +23,22 @@ declare module "react-native-wechat-lib" {
     lang?: string;
     country?: string;
   }
+  export interface WeChatReq {
+    type?: string,
+    errStr?: string,
+    extMsg?: string,
+    country?: string,
+    state?: string,
+    returnKey?: string
+  }
+  export interface WeChatResp {
+    type?: string,
+    errStr?: string,
+    extMsg?: string,
+    country?: string,
+    state?: string,
+    returnKey?: string
+  }
   export function sendAuthRequest(
     scope: string | string[],
     state?: string
diff --git a/ios/RCTWeChat.m b/ios/RCTWeChat.m
index 1a9b07c..24c983c 100644
--- a/ios/RCTWeChat.m
+++ b/ios/RCTWeChat.m
@@ -467,7 +467,7 @@ RCT_EXPORT_METHOD(pay:(NSDictionary *)data
         body[@"type"] = @"LaunchFromWX.Req";
         body[@"lang"] =  launchReq.lang;
         body[@"country"] = launchReq.country;
-        body[@"appParameter"] = appParameter;
+        body[@"extMsg"] = appParameter;
         [self.bridge.eventDispatcher sendDeviceEventWithName:RCTWXEventNameWeChatReq body:body];
     }
 }
diff --git a/package.json b/package.json
index 53d5cda..73b62b5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-wechat-lib",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "react-native library for wechat app",
   "main": "index.js",
   "scripts": {