diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 00000000..0516a8a8
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,7 @@
+declare module 'express-promise-router' {
+    import {Router, RouterOptions} from 'express'
+
+    function Router(options?: RouterOptions): Router
+
+    export = Router
+}
diff --git a/package.json b/package.json
index bc8c7e6e..123c9da1 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "methods": "^1.0.0"
   },
   "peerDependencies": {
+    "@types/express": "^4.0.0",
     "express": "4.x"
   },
   "devDependencies": {
@@ -51,6 +52,7 @@
     "shared-git-hooks": "^1.2.1",
     "sinon": "^4.0.0"
   },
+  "types": "index.d.ts",
   "scripts": {
     "format": "prettier --write --trailing-comma es5 --print-width 120 --single-quote --tab-width 4 'lib/*.js' 'test/*.js'",
     "lint": "eslint {lib,test}/**/*.js",