diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..c3d04d1
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,10 @@
+import { Probot } from "probot";
+import { APIGatewayProxyHandler } from "aws-lambda";
+import { ApplicationFunction } from "probot/lib/types";
+
+export * from "probot";
+
+export function createLambdaFunction(
+  app: ApplicationFunction,
+  options: { probot: Probot }
+): APIGatewayProxyHandler;
diff --git a/package-lock.json b/package-lock.json
index f422cc4..9d97ab8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1246,6 +1246,12 @@
         "defer-to-connect": "^1.0.1"
       }
     },
+    "@types/aws-lambda": {
+      "version": "8.10.85",
+      "resolved": "https://registry.npmjs.org/@types/aws-lambda/-/aws-lambda-8.10.85.tgz",
+      "integrity": "sha512-cMRXVxb+NMb6EekKel1fPBfz2ZqE5cGhIS14G7FVUM4Bqilx0lHKnZbsDLWLSeckDpkvlp5six2F7UWyEEJSoQ==",
+      "dev": true
+    },
     "@types/babel__core": {
       "version": "7.1.12",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.1.12.tgz",
diff --git a/package.json b/package.json
index 207fe55..fa3fbb9 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   },
   "description": "An extension for running Probot in AWS Lambda",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "lint": "prettier --check '*.{js,md,json}' 'test/**/*.{js,json}' '.github/**/*.yml'",
     "lint:fix": "prettier --write '*.{js,md,json}' 'test/**/*.{js,json}' '.github/**/*.yml'",
@@ -14,6 +15,7 @@
   "repository": "github:probot/adapter-aws-lambda-serverless",
   "dependencies": {
     "@probot/get-private-key": "^1.1.0",
+    "@types/aws-lambda": "^8.10.85",
     "probot": "^11.0.6",
     "lowercase-keys": "^2.0.0"
   },