diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec9a9b6..73d7f09 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2019-06-21
+
+- 修复`Worker`Api的问题
+
 ## 2019-06-13
 
 - 解决ISSUE[Need not to declare `require` function for d.ts?](https://github.com/Adherentman/Typescript-wxApi.d.ts/issues/12)
diff --git a/wx.d.ts b/wx.d.ts
index 7eed49a..7ecde4c 100755
--- a/wx.d.ts
+++ b/wx.d.ts
@@ -20,6 +20,7 @@ type ZeroParamVoidFunc = () => void;
 interface ReturnCallBack {
 	(res: ZeroParamVoidFunc): void;
 }
+
 interface createLiveObj extends WxApiCallback {}
 
 // App Types
@@ -3121,8 +3122,8 @@ interface MultithreadingAPIs {
 }
 
 interface workerAPIs {
-	postMessage: any;
-	onMessage: ZeroParamVoidFunc;
+	postMessage: ({msg: string}) => void;
+	onMessage: any;
 	terminate: ZeroParamVoidFunc;
 }