diff --git a/README.md b/README.md
index 2b04db00..7ddd5edb 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,8 @@
 Hono [炎] - Tiny web framework for Cloudflare Workers and others.
 
 ```js
-const Hono = require('hono')
-const app = Hono()
+const { Hono } = require('hono')
+const app = new Hono()
 
 app.get('/', () => new Response('Hono!!'))
 
diff --git a/benchmark/handleEvent/index.js b/benchmark/handleEvent/index.js
index 96a52717..194dc0f0 100644
--- a/benchmark/handleEvent/index.js
+++ b/benchmark/handleEvent/index.js
@@ -1,13 +1,13 @@
 import Benchmark from 'benchmark'
 import { makeEdgeEnv } from 'edge-mock'
-import Hono from '../../src/hono.js'
+import { Hono } from '../../src/hono.js'
 import itty from 'itty-router'
 const { Router: IttyRouter } = itty
 import { Router as SunderRouter, Sunder } from 'sunder'
 
 makeEdgeEnv()
 
-const hono = Hono()
+const hono = new Hono()
 hono.get('/user', () => new Response('User'))
 hono.get('/user/comments', () => new Response('User Comments'))
 hono.get('/user/avatar', () => new Response('User Avatar'))
diff --git a/benchmark/webapp/hono/index.js b/benchmark/webapp/hono/index.js
index 48467f39..5f370ce5 100644
--- a/benchmark/webapp/hono/index.js
+++ b/benchmark/webapp/hono/index.js
@@ -1,6 +1,6 @@
-const Hono = require('../../../src/hono')
+const { Hono } = require('../../../src/hono')
 
-const hono = Hono()
+const hono = new Hono()
 hono.get('/user', () => new Response('User'))
 hono.get('/user/comments', () => new Response('User Comments'))
 hono.get('/user/avatar', () => new Response('User Avatar'))
diff --git a/example/basic/README.md b/example/basic/README.md
index 22cb56f8..371fda9a 100644
--- a/example/basic/README.md
+++ b/example/basic/README.md
@@ -1,11 +1,11 @@
-# Hono example for cloudflare worker
+# Hono example for Cloudflare Workers
 
 Before you can start publishing your service to cloudflare worker, you must sign up for a Cloudflare Workers account first, you can check out this [document](https://developers.cloudflare.com/workers/get-started/guide)
 
 You can update the information (`name`, `zoon_id`, etc) in wrangler file, then you can test and deploy your service by simply doing,
 
 ```sh
-$ npm install 
+$ npm install
 $ npm run dev 		# Start a local server for developing your worker
 $ npm run publish # Publish your worker to the orange cloud
 ```
diff --git a/example/basic/index.js b/example/basic/index.js
index abccfec8..1ecff8cc 100644
--- a/example/basic/index.js
+++ b/example/basic/index.js
@@ -1,5 +1,5 @@
-const Hono = require('../../src/hono')
-const app = Hono()
+const { Hono } = require('../../src/hono')
+const app = new Hono()
 
 // Middleware
 const logger = (c, next) => {
diff --git a/example/compute-at-edge/index.js b/example/compute-at-edge/index.js
index 75fa3b3b..71e95deb 100644
--- a/example/compute-at-edge/index.js
+++ b/example/compute-at-edge/index.js
@@ -1,5 +1,5 @@
-const Hono = require('hono')
-const app = Hono()
+const { Hono } = require('hono')
+const app = new Hono()
 
 app.use('*', (c, next) => {
   console.log(`[${c.req.method}] ${c.req.url}`)
diff --git a/src/hono.d.ts b/src/hono.d.ts
new file mode 100644
index 00000000..d47faa76
--- /dev/null
+++ b/src/hono.d.ts
@@ -0,0 +1,42 @@
+declare class FetchEvent {}
+declare class Request {}
+declare class Response {}
+declare class Context {}
+
+declare class Node {}
+
+declare class Router {
+  tempPath: string
+  node: Node
+
+  add(method: string, path: string, handlers: any[]): Node
+  match(method: string, path: string): Node
+}
+
+export class Hono {
+  router: Router
+  middlewareRouters: Router[]
+
+  getRouter(): Router
+  addRoute(method: string, args: any[]): Hono
+  matchRoute(method: string, path: string): Node
+  createContext(req: Request, res: Response): Context
+  dispatch(req: Request, res: Response): Response
+  handleEvent(event: FetchEvent): Response
+  fire(): void
+
+  notFound(): Response
+
+  route(path: string): Hono
+
+  use(path: string, middleware: any): void
+
+  all(path: string, handler: any): Hono
+  get(path: string, handler: any): Hono
+  post(path: string, handler: any): Hono
+  put(path: string, handler: any): Hono
+  head(path: string, handler: any): Hono
+  delete(path: string, handler: any): Hono
+}
+
+export class Middleware {}
diff --git a/src/hono.js b/src/hono.js
index b24e1b8b..5d09557e 100644
--- a/src/hono.js
+++ b/src/hono.js
@@ -4,6 +4,7 @@ const Node = require('./node')
 const compose = require('./compose')
 const methods = require('./methods')
 const defaultFilter = require('./middleware/defaultFilter')
+const Middleware = require('./middleware')
 
 const METHOD_NAME_OF_ALL = 'ALL'
 
@@ -132,6 +133,10 @@ class Hono {
   }
 }
 
-module.exports = () => {
-  return new Hono()
-}
+// Default Export
+module.exports = Hono
+exports = module.exports
+
+// Named Export
+exports.Hono = Hono
+exports.Middleware = Middleware
diff --git a/src/hono.test.js b/src/hono.test.js
index a0474e81..6494285c 100644
--- a/src/hono.test.js
+++ b/src/hono.test.js
@@ -1,8 +1,9 @@
-const Hono = require('./hono')
 const fetch = require('node-fetch')
+const { Hono } = require('./hono')
 
 describe('GET Request', () => {
-  const app = Hono()
+  const app = new Hono()
+
   app.get('/hello', () => {
     return new fetch.Response('hello', {
       status: 200,
@@ -29,7 +30,7 @@ describe('GET Request', () => {
 })
 
 describe('params and query', () => {
-  const app = Hono()
+  const app = new Hono()
 
   app.get('/entry/:id', async (c) => {
     const id = await c.req.params('id')
@@ -60,7 +61,7 @@ describe('params and query', () => {
 })
 
 describe('Middleware', () => {
-  const app = Hono()
+  const app = new Hono()
 
   const logger = async (c, next) => {
     console.log(`${c.req.method} : ${c.req.url}`)
diff --git a/src/middleware.js b/src/middleware.js
new file mode 100644
index 00000000..c49064bf
--- /dev/null
+++ b/src/middleware.js
@@ -0,0 +1,3 @@
+class Middleware {}
+
+module.exports = Middleware
diff --git a/src/router.test.js b/src/router.test.js
index ac6b5f25..f541de4e 100644
--- a/src/router.test.js
+++ b/src/router.test.js
@@ -1,7 +1,7 @@
-const App = require('./hono')
+const { Hono } = require('./hono')
 
 describe('Basic Usage', () => {
-  const router = App()
+  const router = new Hono()
 
   it('get, post hello', async () => {
     router.get('/hello', 'get hello')
@@ -24,7 +24,7 @@ describe('Basic Usage', () => {
 })
 
 describe('Complex', () => {
-  let router = App()
+  let router = new Hono()
 
   it('Named Param', async () => {
     router.get('/entry/:id', 'get entry')
@@ -56,7 +56,7 @@ describe('Complex', () => {
 })
 
 describe('Chained Route', () => {
-  let router = App()
+  let router = new Hono()
 
   it('Return rooter object', async () => {
     router = router.patch('/hello', 'patch hello')