diff --git a/.travis.yml b/.travis.yml
index a4e479b..69f01ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 node_js:
-  - "0.12"
   - "4"
-  - "5"
   - "6"
+  - "7"
+  - "8"
 sudo: false
diff --git a/LICENSE b/LICENSE
index 5341e8a..39cf462 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015-2016 thunks
+Copyright (c) 2015-2017 thunks
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index 8fcb3a7..c3e4251 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-thunk-stream
-====
+# thunk-stream
+
 Wrap a readable/writable/duplex/transform stream to a thunk.
 
 [![NPM version][npm-image]][npm-url]
@@ -11,12 +11,12 @@ Wrap a readable/writable/duplex/transform stream to a thunk.
 ## Demo
 
 ```js
-var thunkStream = require('thunk-stream')
-var stream = require('stream')
-var fs = require('fs')
+const thunkStream = require('thunk-stream')
+const stream = require('stream')
+const fs = require('fs')
 
-var readableStream = fs.createReadStream('index.js')
-var passStream = new stream.PassThrough()
+const readableStream = fs.createReadStream('index.js')
+const passStream = new stream.PassThrough()
 
 thunkStream(readableStream)(function (error) {
   if (error) console.error('error', error)
@@ -39,7 +39,7 @@ npm install thunk-stream
 ## API
 
 ```js
-var thunkStream = require('thunk-stream')
+const thunkStream = require('thunk-stream')
 ```
 
 ### thunkStream(stream[, options])
diff --git a/index.js b/index.js
index fea385b..916d8e0 100644
--- a/index.js
+++ b/index.js
@@ -3,21 +3,21 @@
 //
 // **License:** MIT
 
-var thunk = require('thunks')()
-var defaultEndEventTypes = ['end', 'finish', 'close']
+const thunk = require('thunks')()
+const defaultEndEventTypes = ['end', 'finish', 'close']
 
 function forEach (obj, iterator) {
-  for (var i = 0, l = obj.length; i < l; i++) iterator(obj[i], i, obj)
+  for (let i = 0, l = obj.length; i < l; i++) iterator(obj[i], i, obj)
 }
 
 module.exports = function thunkStream (stream, options) {
   options = options || {}
 
-  var resultThunk = thunk.call(this, function (callback) {
-    var clear = false
-    var flags = Object.create(null)
-    var endEventTypes = []
-    var endEventType = options.endEventType
+  const resultThunk = thunk.call(this, function (callback) {
+    const flags = Object.create(null)
+    const endEventTypes = []
+    const endEventType = options.endEventType
+    let clear = false
 
     function onend () {
       removeListener()
diff --git a/package.json b/package.json
index 5b500b2..c9931ae 100644
--- a/package.json
+++ b/package.json
@@ -4,13 +4,16 @@
   "authors": [
     "Yan Qing <admin@zensh.com>"
   ],
-  "version": "1.1.8",
+  "version": "1.2.0",
   "main": "index.js",
   "repository": {
     "type": "git",
     "url": "git@github.com:thunks/thunk-stream.git"
   },
   "homepage": "https://github.com/thunks/thunk-stream",
+  "engines": {
+    "node": ">= 4"
+  },
   "keywords": [
     "thunk",
     "thunks",
@@ -24,11 +27,11 @@
     "wait"
   ],
   "dependencies": {
-    "thunks": "^4.7.5"
+    "thunks": "^4.8.0"
   },
   "devDependencies": {
-    "standard": "^8.3.0",
-    "tman": "^1.6.0"
+    "standard": "^10.0.2",
+    "tman": "^1.6.9"
   },
   "scripts": {
     "test": "standard && tman"
diff --git a/test/index.js b/test/index.js
index 6acdb76..96b1b37 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,17 +1,17 @@
 'use strict'
-/* global describe, it */
 
-var assert = require('assert')
-var thunkStream = require('../index.js')
-var stream = require('stream')
-var fs = require('fs')
+const assert = require('assert')
+const thunkStream = require('../index.js')
+const stream = require('stream')
+const fs = require('fs')
+const tman = require('tman')
 
-describe('thunk-stream', function () {
-  it('thunkStream(readableStream) success', function (done) {
-    var readableStream = fs.createReadStream('index.js')
-    var passStream = new stream.PassThrough()
+tman.suite('thunk-stream', function () {
+  tman.it('thunkStream(readableStream) success', function (done) {
+    let readableStream = fs.createReadStream('index.js')
+    let passStream = new stream.PassThrough()
 
-    var readableStreamEnded = false
+    let readableStreamEnded = false
 
     thunkStream(readableStream)(function (error) {
       assert.strictEqual(error, null)
@@ -28,9 +28,9 @@ describe('thunk-stream', function () {
     readableStream.pipe(passStream)
   })
 
-  it('thunkStream(readableStream) error', function (done) {
-    var readableStream = fs.createReadStream('none.js')
-    var passStream = new stream.PassThrough()
+  tman.it('thunkStream(readableStream) error', function (done) {
+    let readableStream = fs.createReadStream('none.js')
+    let passStream = new stream.PassThrough()
 
     thunkStream(readableStream)(function (error) {
       assert.strictEqual(error instanceof Error, true)
@@ -44,10 +44,10 @@ describe('thunk-stream', function () {
     readableStream.pipe(passStream)
   })
 
-  it('thunkStream(writableStream) success', function (done) {
-    var readableStream = fs.createReadStream('index.js')
-    var writableStream = new stream.Writable()
-    var readableStreamEnded = false
+  tman.it('thunkStream(writableStream) success', function (done) {
+    let readableStream = fs.createReadStream('index.js')
+    let writableStream = new stream.Writable()
+    let readableStreamEnded = false
 
     writableStream._write = function (chunk, encoding, cb) {
       cb(null, chunk)
@@ -68,9 +68,9 @@ describe('thunk-stream', function () {
     readableStream.pipe(writableStream)
   })
 
-  it('thunkStream(writableStream).clearListeners()', function (done) {
-    var readableStream = fs.createReadStream('index.js')
-    var writableStream = new stream.Writable()
+  tman.it('thunkStream(writableStream).clearListeners()', function (done) {
+    let readableStream = fs.createReadStream('index.js')
+    let writableStream = new stream.Writable()
 
     writableStream._write = function (chunk, encoding, cb) {
       cb(null, chunk)
@@ -81,7 +81,7 @@ describe('thunk-stream', function () {
       assert.strictEqual(readableStream.closed, true)
     })
 
-    var thunk = thunkStream(writableStream)
+    let thunk = thunkStream(writableStream)
     // clearListeners is add after thunk called.
     assert.strictEqual(thunk.clearListeners, undefined)
     thunk(function (_) {