diff --git a/package-lock.json b/package-lock.json
index afc71d0..41af9b4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -764,9 +764,9 @@
       }
     },
     "@types/aws-lambda": {
-      "version": "8.10.33",
-      "resolved": "https://registry.npmjs.org/@types/aws-lambda/-/aws-lambda-8.10.33.tgz",
-      "integrity": "sha512-BZ8lPY/vyUq+Bid/BgYrKbUF36SZYuGOAMgOq/VgqnTQnCn9GBo3HejKZ6xrUzA8zLf9Pjs707amkt4f7rWujw==",
+      "version": "8.10.40",
+      "resolved": "https://registry.npmjs.org/@types/aws-lambda/-/aws-lambda-8.10.40.tgz",
+      "integrity": "sha512-D0hOUw2y6in/cPWv0JMMCBnO3Hc/DNeLi8QQ1wymwk9Eixh6IFgVnCGJnUHefjxKEAVxL7z6LKBsFUrIjKygRg==",
       "dev": true
     },
     "@types/babel__core": {
diff --git a/package.json b/package.json
index 9f810c2..beed0c1 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "homepage": "https://github.com/muratcorlu/lambda-expressless#readme",
   "devDependencies": {
     "@types/accepts": "^1.3.5",
-    "@types/aws-lambda": "^8.10.33",
+    "@types/aws-lambda": "^8.10.40",
     "@types/connect": "^3.4.33",
     "body-parser": "^1.19.0",
     "jest": "^24.9.0",
diff --git a/src/lambda-wrapper.d.ts b/src/lambda-wrapper.d.ts
index 55ff65a..f1d556c 100644
--- a/src/lambda-wrapper.d.ts
+++ b/src/lambda-wrapper.d.ts
@@ -1,8 +1,11 @@
 import { Request } from './request';
 import { Response } from './response';
-import { APIGatewayProxyHandler } from 'aws-lambda';
+import { APIGatewayProxyEvent, Context, APIGatewayProxyResult } from 'aws-lambda';
 import { NextFunction, NextHandleFunction } from "connect";
 
+export interface APIGatewayProxyHandler {
+  (event: APIGatewayProxyEvent, context: Context): Promise<APIGatewayProxyResult>
+}
 
 export interface Middleware extends NextHandleFunction {
     (request: Request, response: Response, next: NextFunction): void