diff --git a/bin/doctor.ts b/bin/doctor.ts
index 291ba551a06d29c1ab1f9ba6503b2c8165c654ae..b0ec67a9e1aabfe503230090eeb429b53e0dec5c 100644
--- a/bin/doctor.ts
+++ b/bin/doctor.ts
@@ -20,9 +20,9 @@
 
 import * as os from 'os'
 
-import Config   from '../src/config'
-import Doctor   from '../src/doctor'
-import Wechaty  from '../src/wechaty'
+import { config }   from '../src/config'
+import { Doctor }   from '../src/doctor'
+import { Wechaty }  from '../src/wechaty'
 
 const wechaty = Wechaty.instance()
 const doctor = new Doctor()
@@ -43,7 +43,7 @@ async function main() {
 
   1. Wechaty version: ${wechaty.version()}
   2. ${os.type()} ${os.arch()} version ${os.release()} memory ${Math.floor(os.freemem() / 1024 / 1024)}/${Math.floor(os.totalmem() / 1024 / 1024)} MB
-  3. Docker: ${Config.dockerMode}
+  3. Docker: ${config.dockerMode}
   4. Node version: ${process.version}
   5. Tcp IPC TEST: ${ipcTestResult}
   6. Chromedriver: ${chromedriverVersion}
diff --git a/bin/io-client.ts b/bin/io-client.ts
index 2ef9ed8135e1b41751500e6d39580b75557ee4da..faeacd9c17660f8430a4db288607f29601a7ca8d 100644
--- a/bin/io-client.ts
+++ b/bin/io-client.ts
@@ -19,7 +19,7 @@
  */
 
 import {
-  Config,
+  config,
   log,
 }               from '../src/config'
 
@@ -42,12 +42,12 @@ __________________________________________________
 
 `
 
-let   token   = Config.token
+let   token   = config.token
 
 if (!token) {
   log.error('Client', 'token not found: please set WECHATY_TOKEN in environment before run io-client')
   // process.exit(-1)
-  token = Config.DEFAULT_TOKEN
+  token = config.DEFAULT_TOKEN
   log.warn('Client', `set token to "${token}" for demo purpose`)
 }
 
diff --git a/example/api-ai-bot.ts b/example/api-ai-bot.ts
index 3ae282ab438c761da5fa382bbae9710a1c4bd063..13bd38c4aad583654b1597ed8e8464ae1f85a10c 100644
--- a/example/api-ai-bot.ts
+++ b/example/api-ai-bot.ts
@@ -41,7 +41,7 @@ import { EventEmitter } from 'events'
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Wechaty,
 }           from '../'
 
@@ -56,7 +56,7 @@ import {
 const APIAI_API_KEY = '7217d7bce18c4bcfbe04ba7bdfaf9c08'
 const brainApiAi = ApiAi(APIAI_API_KEY)
 
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 console.log(`
 Welcome to api.AI Wechaty Bot.
diff --git a/example/contact-bot.ts b/example/contact-bot.ts
index f7714a4f0ca7e761edb5950cc76cbf75e5c504d4..cbdeb7634ca71fa56f1e64b28125f203489b1af4 100644
--- a/example/contact-bot.ts
+++ b/example/contact-bot.ts
@@ -28,7 +28,7 @@ const QrcodeTerminal = require('qrcode-terminal')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Contact,
   Wechaty,
   log,
@@ -54,7 +54,7 @@ Please wait... I'm trying to login in...
 `
 
 console.log(welcome)
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('login'	  , function(this, user) {
diff --git a/example/ding-dong-bot.ts b/example/ding-dong-bot.ts
index be3ee5e1f8291699df0da2d9ed6c4c7562542355..368ee86936d1daef75f61cd9754ae8dd1cc2fbe2 100644
--- a/example/ding-dong-bot.ts
+++ b/example/ding-dong-bot.ts
@@ -27,7 +27,7 @@ const finis           = require('finis')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Wechaty,
   log,
   MediaMessage,
@@ -57,7 +57,7 @@ Please wait... I'm trying to login in...
 `
 
 console.log(welcome)
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('logout'	, user => log.info('Bot', `${user.name()} logouted`))
diff --git a/example/friend-bot.ts b/example/friend-bot.ts
index f304a4e12c70f8688a7084d7de856a25d7839dc3..b4f358479ebc09e0f5cfe8ed9c1e8d2ba3039cd7 100644
--- a/example/friend-bot.ts
+++ b/example/friend-bot.ts
@@ -26,10 +26,10 @@ const QrcodeTerminal = require('qrcode-terminal')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Wechaty,
+  config,
   Contact,
-  Config,
   log,
+  Wechaty,
 }           from '../'
 
 const welcome = `
@@ -57,7 +57,7 @@ Please wait... I'm trying to login in...
 `
 
 console.log(welcome)
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('login'	  , user => log.info('Bot', `${user.name()} logined`))
diff --git a/example/gist-bot/index.ts b/example/gist-bot/index.ts
index a22f430a1de31c6b9c7438892ddf2daf194a4909..eb9f8340cb0d84c01903fe1193317dd296834cd9 100644
--- a/example/gist-bot/index.ts
+++ b/example/gist-bot/index.ts
@@ -23,7 +23,7 @@
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Wechaty,
   log,
 }           from '../../'
@@ -41,7 +41,7 @@ Please wait... I'm trying to login in...
 `
 console.log(welcome)
 
-Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 .on('scan', (url, code) => {
   if (!/201|200/.test(String(code))) {
diff --git a/example/media-file-bot.ts b/example/media-file-bot.ts
index 9e75ffe8c8cd3bee4aedc7bdcafdf3b3ea712d65..f64e9e4b8ea150695dc685409e3990d3754df8cf 100644
--- a/example/media-file-bot.ts
+++ b/example/media-file-bot.ts
@@ -32,12 +32,12 @@ import * as qrcodeTerminal  from 'qrcode-terminal'
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Message,
   MsgType,
   Wechaty,
 }           from '../'
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('scan', (url, code) => {
diff --git a/example/room-bot.ts b/example/room-bot.ts
index c8209b1d70ce03ca0ba90fdf0a536c568f5e2a7b..73e641a75bc3964e4be0894df185fb6976a081d9 100644
--- a/example/room-bot.ts
+++ b/example/room-bot.ts
@@ -53,7 +53,7 @@ const qrcodeTerminal = require('qrcode-terminal')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Contact,
   Room,
   Wechaty,
@@ -86,7 +86,7 @@ Please wait... I'm trying to login in...
 
 `
 console.log(welcome)
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('scan', (url, code) => {
diff --git a/example/speech-to-text-bot.ts b/example/speech-to-text-bot.ts
index d61f306e62ccc039a923f88fb26601ed925d94ac..e8c49ded7fd89ee2570f3a36b9310c89e9576e12 100644
--- a/example/speech-to-text-bot.ts
+++ b/example/speech-to-text-bot.ts
@@ -33,13 +33,13 @@ const qrcodeTerminal = require('qrcode-terminal')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   MediaMessage,
   MsgType,
   Wechaty,
 }                 from '../'
 
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 bot
 .on('scan', (url, code) => {
diff --git a/example/tuling123-bot.ts b/example/tuling123-bot.ts
index a530e98be20a8010371e7b0e66649bc95e139952..0de887dfdc7cbdd5e593550ff1b832ac73f5adc3 100644
--- a/example/tuling123-bot.ts
+++ b/example/tuling123-bot.ts
@@ -36,7 +36,7 @@ const Tuling123       = require('tuling123-client')
  * when you are runing with Docker or NPM instead of Git Source.
  */
 import {
-  Config,
+  config,
   Wechaty,
   log,
 }           from '../'
@@ -53,7 +53,7 @@ import {
 const TULING123_API_KEY = '18f25157e0446df58ade098479f74b21'
 const tuling = new Tuling123(TULING123_API_KEY)
 
-const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
+const bot = Wechaty.instance({ profile: config.DEFAULT_PROFILE })
 
 console.log(`
 Welcome to Tuling Wechaty Bot.
diff --git a/index.ts b/index.ts
index 65b3e986f6fc770e526647fae98a344c24c607ff..1a37dd03d3fc588fd00e5d7d3ab98a3cd6f942db 100644
--- a/index.ts
+++ b/index.ts
@@ -1,7 +1,7 @@
 import {
-  Config,
-  Sayable,
+  config,
   log,
+  Sayable,
 }                     from './src/config'
 import Contact        from './src/contact'
 
@@ -23,7 +23,7 @@ import Wechaty        from './src/wechaty'
 const VERSION = require('./package.json').version
 
 export {
-  Config,
+  config,
   Contact,
   FriendRequest,
   IoClient,
diff --git a/src/config.spec.ts b/src/config.spec.ts
index a60e7a28de60baf46066696f3fe2d2b9c5682068..a03e1505d621863efaa8bdc1b452a4ed6e63702c 100644
--- a/src/config.spec.ts
+++ b/src/config.spec.ts
@@ -18,24 +18,24 @@
  */
 import { test }   from 'ava'
 
-import { Config } from './config'
+import { config } from './config'
 import { Puppet } from './puppet'
 
 test('important variables', t => {
-  t.true('head'     in Config, 'should exist `head` in Config')
-  t.true('puppet'   in Config, 'should exist `puppet` in Config')
-  t.true('apihost'  in Config, 'should exist `apihost` in Config')
-  t.true('port'     in Config, 'should exist `port` in Config')
-  t.true('profile'  in Config, 'should exist `profile` in Config')
-  t.true('token'    in Config, 'should exist `token` in Config')
+  t.true('head'     in config, 'should exist `head` in Config')
+  t.true('puppet'   in config, 'should exist `puppet` in Config')
+  t.true('apihost'  in config, 'should exist `apihost` in Config')
+  t.true('port'     in config, 'should exist `port` in Config')
+  t.true('profile'  in config, 'should exist `profile` in Config')
+  t.true('token'    in config, 'should exist `token` in Config')
 
-  t.truthy(Config.DEFAULT_PUPPET      , 'should export DEFAULT_PUPPET')
-  t.truthy(Config.DEFAULT_PORT        , 'should export DEFAULT_PORT')
-  t.truthy(Config.DEFAULT_PROFILE     , 'should export DEFAULT_PROFILE')
-  t.truthy(Config.DEFAULT_HEAD        , 'should export DEFAULT_HEAD')
-  t.truthy(Config.DEFAULT_PROTOCOL    , 'should export DEFAULT_PROTOCOL')
-  t.truthy(Config.DEFAULT_APIHOST     , 'should export DEFAULT_APIHOST')
-  t.truthy(Config.CMD_CHROMIUM        , 'should export CMD_CHROMIUM')
+  t.truthy(config.DEFAULT_PUPPET      , 'should export DEFAULT_PUPPET')
+  t.truthy(config.DEFAULT_PORT        , 'should export DEFAULT_PORT')
+  t.truthy(config.DEFAULT_PROFILE     , 'should export DEFAULT_PROFILE')
+  t.truthy(config.DEFAULT_HEAD        , 'should export DEFAULT_HEAD')
+  t.truthy(config.DEFAULT_PROTOCOL    , 'should export DEFAULT_PROTOCOL')
+  t.truthy(config.DEFAULT_APIHOST     , 'should export DEFAULT_APIHOST')
+  t.truthy(config.CMD_CHROMIUM        , 'should export CMD_CHROMIUM')
 })
 
 test('validApiHost()', t => {
@@ -49,12 +49,12 @@ test('validApiHost()', t => {
   ]
   OK_APIHOSTS.forEach(apihost => {
     t.notThrows(() => {
-      Config.validApiHost(apihost)
+      config.validApiHost(apihost)
     })
   }, 'should not row for right apihost')
   ERR_APIHOSTS.forEach(apihost => {
     t.throws(() => {
-      Config.validApiHost(apihost)
+      config.validApiHost(apihost)
     })
   }, 'should throw for error apihost')
 
@@ -62,30 +62,30 @@ test('validApiHost()', t => {
 
 test('puppetInstance()', t => {
   t.throws(() => {
-    Config.puppetInstance()
+    config.puppetInstance()
   }, Error, 'should throw when not initialized')
 
   const EXPECTED = <Puppet>{userId: 'test'}
   const mockPuppet = EXPECTED
 
-  Config.puppetInstance(mockPuppet)
-  const instance = Config.puppetInstance()
+  config.puppetInstance(mockPuppet)
+  const instance = config.puppetInstance()
   t.deepEqual(instance, EXPECTED, 'should equal with initialized data')
 
-  Config.puppetInstance(null)
+  config.puppetInstance(null)
   t.throws(() => {
-    Config.puppetInstance()
+    config.puppetInstance()
   }, Error, 'should throw after set to null')
 
 })
 
 test('dockerMode', t => {
-  t.true('dockerMode' in Config, 'should identify docker env by `dockerMode`')
+  t.true('dockerMode' in config, 'should identify docker env by `dockerMode`')
 
   if ('C9_PORT' in process.env) {
-    t.is(Config.dockerMode, false, 'should not in docker mode in Cloud9 IDE')
+    t.is(config.dockerMode, false, 'should not in docker mode in Cloud9 IDE')
   } else if (require('is-ci')) {
-    t.is(Config.dockerMode, false, 'should not in docker mode in Continuous Integeration System')
+    t.is(config.dockerMode, false, 'should not in docker mode in Continuous Integeration System')
   } else {
     // a custom running envioronment, maybe docker, maybe not
   }
diff --git a/src/config.ts b/src/config.ts
index 18b7c10daef1d3162882a52cd05a3e8927e2ee43..98db4f5ff26945e41820322992f37a22299658ac 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -16,7 +16,43 @@
  *   limitations under the License.
  *
  */
-import * as os from 'os'
+import * as fs    from 'fs'
+import * as os    from 'os'
+import * as path  from 'path'
+
+/**
+ * Raven.io
+ */
+import * as Raven from 'raven'
+Raven.disableConsoleAlerts()
+
+Raven
+.config(
+  process.env.NODE_ENV === 'production'
+    && 'https://f6770399ee65459a82af82650231b22c:d8d11b283deb441e807079b8bb2c45cd@sentry.io/179672',
+  {
+    release: require('../package.json').version,
+    tags: {
+      git_commit: 'c0deb10c4',
+      platform:   !!process.env('WECHATY_DOCKER')
+                  ? 'docker'
+                  : os.platform(),
+    },
+  },
+)
+.install()
+
+/*
+try {
+    doSomething(a[0])
+} catch (e) {
+    Raven.captureException(e)
+}
+
+Raven.context(function () {
+  doSomething(a[0])
+})
+ */
 
 // const isCi      = require('is-ci')
 // const isDocker  = require('is-docker')
@@ -78,22 +114,24 @@ export interface ConfigSetting {
   puppetInstance(): Puppet
   puppetInstance(empty: null): void
   puppetInstance(instance: Puppet): void
-  puppetInstance(instance?: Puppet | null): Puppet | void
+  puppetInstance(instance?: Puppet | null): Puppet | void,
 
-  dockerMode: boolean
+  gitVersion(): string | null,
+  npmVersion(): string,
 
+  dockerMode: boolean,
 }
 /* tslint:disable:variable-name */
 /* tslint:disable:no-var-requires */
-export const Config: ConfigSetting = require('../package.json').wechaty
+export const config: ConfigSetting = require('../package.json').wechaty
 
 /**
  * 1. ENVIRONMENT VARIABLES + PACKAGES.JSON (default)
  */
-Object.assign(Config, {
-  apihost:    process.env['WECHATY_APIHOST']   || Config.DEFAULT_APIHOST,
-  head:       process.env['WECHATY_HEAD']      || Config.DEFAULT_HEAD,
-  puppet:     process.env['WECHATY_PUPPET']    || Config.DEFAULT_PUPPET,
+Object.assign(config, {
+  apihost:    process.env['WECHATY_APIHOST']   || config.DEFAULT_APIHOST,
+  head:       process.env['WECHATY_HEAD']      || config.DEFAULT_HEAD,
+  puppet:     process.env['WECHATY_PUPPET']    || config.DEFAULT_PUPPET,
   validApiHost,
 })
 
@@ -103,12 +141,12 @@ function validApiHost(apihost: string): boolean {
   }
   throw new Error('validApiHost() fail for ' + apihost)
 }
-validApiHost(Config.apihost)
+validApiHost(config.apihost)
 
 /**
  * 2. ENVIRONMENT VARIABLES (only)
  */
-Object.assign(Config, {
+Object.assign(config, {
   port:       process.env['WECHATY_PORT']     || null, // 0 for disable port
   profile:  process.env['WECHATY_PROFILE']    || null, // DO NOT set DEFAULT_PROFILE, because sometimes user do not want to save session
   token:    process.env['WECHATY_TOKEN']      || null, // DO NOT set DEFAULT, because sometimes user do not want to connect to io cloud service
@@ -118,15 +156,15 @@ Object.assign(Config, {
 /**
  * 3. Service Settings
  */
-Object.assign(Config, {
+Object.assign(config, {
   // get PORT form cloud service env, ie: heroku
-  httpPort: process.env['PORT'] || process.env['WECHATY_PORT'] || Config.DEFAULT_PORT,
+  httpPort: process.env['PORT'] || process.env['WECHATY_PORT'] || config.DEFAULT_PORT,
 })
 
 /**
  * 4. Envioronment Identify
  */
-Object.assign(Config, {
+Object.assign(config, {
   dockerMode: !!process.env('WECHATY_DOCKER'),
   isGlobal:  isWechatyInstalledGlobal(),
 })
@@ -195,7 +233,52 @@ function puppetInstance(instance?: Puppet | null): Puppet | void {
 
 }
 
-Object.assign(Config, {
+function gitVersion(): string | null {
+  const dotGitPath  = path.join(__dirname, '..', '.git') // only for ts-node, not for dist
+  // const gitLogArgs  = ['log', '--oneline', '-1']
+  // TODO: use git rev-parse HEAD ?
+  const gitArgs  = ['rev-parse', 'HEAD']
+
+  try {
+    // Make sure this is a Wechaty repository
+    fs.statSync(dotGitPath).isDirectory()
+
+    const ss = require('child_process')
+                .spawnSync('git', gitArgs, { cwd:  __dirname })
+
+    if (ss.status !== 0) {
+      throw new Error(ss.error)
+    }
+
+    const revision = ss.stdout
+                      .toString()
+                      .trim()
+                      .slice(0, 7)
+    return revision
+
+  } catch (e) { /* fall safe */
+    /**
+     *  1. .git not exist
+     *  2. git log fail
+     */
+    log.silly('Wechaty', 'version() form development environment is not availble: %s', e.message)
+    return null
+  }
+}
+
+function npmVersion(): string {
+  try {
+    return require('../package.json').version
+  } catch (e) {
+    log.error('Wechaty', 'npmVersion() exception %s', e.message)
+    Raven.captureException(e)
+    return '0.0.0'
+  }
+}
+
+Object.assign(config, {
+  gitVersion,
+  npmVersion,
   puppetInstance,
 })
 
@@ -236,38 +319,9 @@ export interface Sleepable {
   sleep(millisecond: number): Promise<void>
 }
 
-import * as Raven from 'raven'
-Raven.disableConsoleAlerts()
-
-Raven
-.config(
-  process.env.NODE_ENV === 'production'
-    && 'https://f6770399ee65459a82af82650231b22c:d8d11b283deb441e807079b8bb2c45cd@sentry.io/179672',
-  {
-    release: require('../package.json').version,
-    tags: {
-      git_commit: 'c0deb10c4',
-      platform: os.platform(),
-    },
-  },
-)
-.install()
-
-/*
-try {
-    doSomething(a[0])
-} catch (e) {
-    Raven.captureException(e)
-}
-
-Raven.context(function () {
-  doSomething(a[0])
-})
- */
-
 export {
   log,
   Raven,
 }
 
-export default Config
+export default config
diff --git a/src/contact.ts b/src/contact.ts
index 72b7726b61ca044ea0429063cef4b4cb3d9d6ca4..d38410b3964d0c189e8e7dda953a71d74d502799 100644
--- a/src/contact.ts
+++ b/src/contact.ts
@@ -17,7 +17,7 @@
  *
  */
 import {
-  Config,
+  config,
   Raven,
   Sayable,
   log,
@@ -329,9 +329,9 @@ export class Contact implements Sayable {
     }
 
     try {
-      const hostname = await (Config.puppetInstance() as PuppetWeb).browser.hostname()
+      const hostname = await (config.puppetInstance() as PuppetWeb).browser.hostname()
       const avatarUrl = `http://${hostname}${this.obj.avatar}`
-      const cookies = await (Config.puppetInstance() as PuppetWeb).browser.readCookie()
+      const cookies = await (config.puppetInstance() as PuppetWeb).browser.readCookie()
       log.silly('Contact', 'avatar() url: %s', avatarUrl)
 
       return UtilLib.urlStream(avatarUrl, cookies)
@@ -388,9 +388,9 @@ export class Contact implements Sayable {
     }
 
     if (!contactGetter) {
-      log.silly('Contact', 'get contact via ' + Config.puppetInstance().constructor.name)
-      contactGetter = Config.puppetInstance()
-                            .getContact.bind(Config.puppetInstance())
+      log.silly('Contact', 'get contact via ' + config.puppetInstance().constructor.name)
+      contactGetter = config.puppetInstance()
+                            .getContact.bind(config.puppetInstance())
     }
     if (!contactGetter) {
       throw new Error('no contatGetter')
@@ -431,7 +431,7 @@ export class Contact implements Sayable {
    * ```
    */
   public self(): boolean {
-    const userId = Config.puppetInstance()
+    const userId = config.puppetInstance()
                           .userId
 
     const selfId = this.id
@@ -522,7 +522,7 @@ export class Contact implements Sayable {
       throw new Error('unsupport name type')
     }
 
-    const contactList = await Config.puppetInstance()
+    const contactList = await config.puppetInstance()
                               .contactFind(filterFunction)
                               .catch(e => {
                                 log.error('Contact', 'findAll() rejected: %s', e.message)
@@ -627,7 +627,7 @@ export class Contact implements Sayable {
       return this.obj && this.obj.alias || null
     }
 
-    return Config.puppetInstance()
+    return config.puppetInstance()
                   .contactAlias(this, newAlias)
                   .then(ret => {
                     if (ret) {
diff --git a/src/friend-request.ts b/src/friend-request.ts
index d459a90a204e0554c0dbf5e849e2cd33d7f001b3..4859492053a98a0f7a4bbf1f7e08b6182dce6efa 100644
--- a/src/friend-request.ts
+++ b/src/friend-request.ts
@@ -18,7 +18,7 @@
  */
 
 import {
-  Config,
+  config,
   log,
 }               from './config'
 import Contact  from './contact'
@@ -32,7 +32,7 @@ export abstract class FriendRequest {
   constructor() {
     log.verbose('FriendRequest', 'constructor()')
 
-    if (!Config.puppetInstance()) {
+    if (!config.puppetInstance()) {
       throw new Error('no Config.puppetInstance() instanciated')
     }
   }
diff --git a/src/io-client.ts b/src/io-client.ts
index 57ab4eb7111666f0811c91c3daaa8ef9f0119fe7..b17453893107bb395931862ad787606185656120 100644
--- a/src/io-client.ts
+++ b/src/io-client.ts
@@ -25,7 +25,7 @@
 import { StateSwitch } from 'state-switch'
 
 import {
-  Config,
+  config,
   log as globalLog,
 }                       from './config'
 import { Io }           from './io'
@@ -39,7 +39,7 @@ export class IoClient {
   private state = new StateSwitch<'online', 'offline'>('IoClient', 'offline', globalLog)
 
   constructor(
-    private token: string = Config.token || Config.DEFAULT_TOKEN,
+    private token: string = config.token || config.DEFAULT_TOKEN,
     private log: any = globalLog,
   ) {
     if (!log) {
@@ -141,7 +141,7 @@ export class IoClient {
     return
   }
 
-  public initWeb(port = Config.httpPort) {
+  public initWeb(port = config.httpPort) {
 //    if (process.env.DYNO) {
 //    }
     const app = require('express')()
diff --git a/src/io.ts b/src/io.ts
index ac181a9a2e2bae39e8e580decf504114a41ed791..5d237b47b8f6c59e04a98b8b79061cf4dad07073 100644
--- a/src/io.ts
+++ b/src/io.ts
@@ -21,7 +21,7 @@ import * as WebSocket from 'ws'
 import { StateSwitch }  from 'state-switch'
 
 import {
-  Config,
+  config,
   // WechatyEventName
   log,
 }                   from './config'
@@ -71,8 +71,8 @@ export class Io {
       throw new Error('Io must has wechaty & token set')
     }
 
-    setting.apihost   = setting.apihost   || Config.apihost
-    setting.protocol  = setting.protocol  || Config.DEFAULT_PROTOCOL
+    setting.apihost   = setting.apihost   || config.apihost
+    setting.protocol  = setting.protocol  || config.DEFAULT_PROTOCOL
 
     this.uuid     = setting.wechaty.uuid
 
diff --git a/src/message.spec.ts b/src/message.spec.ts
index 4d5e74ab9decafeaa35efd3ef1bd4594f1123f35..851d849db9dcfa254f66e856f264f5870a6017f6 100644
--- a/src/message.spec.ts
+++ b/src/message.spec.ts
@@ -19,7 +19,7 @@
 import { test } from 'ava'
 
 import {
-  Config,
+  config,
   log,
 }                 from './config'
 import Message    from './message'
@@ -29,7 +29,7 @@ const MOCK_USER_ID = 'TEST-USER-ID'
 
 const puppet = new PuppetWeb()
 puppet.userId = MOCK_USER_ID
-Config.puppetInstance(puppet)
+config.puppetInstance(puppet)
 
 test('constructor()', t => {
   /* tslint:disable:max-line-length */
@@ -93,7 +93,7 @@ test.serial('ready()', async t => {
     })
   }
 
-  Config.puppetInstance()
+  config.puppetInstance()
         .getContact = mockGetContact
 
   const m = new Message(rawData)
@@ -131,7 +131,7 @@ test('findAll()', async t => {
 })
 
 test('self()', t => {
-  Config.puppetInstance()
+  config.puppetInstance()
 
   const m = new Message()
   m.from(MOCK_USER_ID)
@@ -183,11 +183,11 @@ test.serial('mentioned()', async t => {
 
   let puppet1
   try {
-    puppet1 = Config.puppetInstance()
+    puppet1 = config.puppetInstance()
     puppet1.getContact = mockContactGetter
   } catch (err) {
     puppet1 = { getContact: mockContactGetter }
-    Config.puppetInstance(puppet1)
+    config.puppetInstance(puppet1)
   }
   const msg11 = new Message(rawObj11)
   const room11 = msg11.room()
diff --git a/src/message.ts b/src/message.ts
index ebfcda969228a75d7af3e87b3118cba64abc4889..7be0dec386c59e93e7ccbc3e40fc26109d905479 100644
--- a/src/message.ts
+++ b/src/message.ts
@@ -20,7 +20,7 @@ import * as fs     from 'fs'
 import * as path   from 'path'
 
 import {
-  Config,
+  config,
   Raven,
   RecommendInfo,
   Sayable,
@@ -414,7 +414,7 @@ export class Message implements Sayable {
   public count()   { return this._counter }
 
   public self(): boolean {
-    const userId = Config.puppetInstance()
+    const userId = config.puppetInstance()
                         .userId
 
     const fromId = this.obj.from
@@ -619,7 +619,7 @@ export class Message implements Sayable {
       }
     }
 
-    return Config.puppetInstance()
+    return config.puppetInstance()
                   .send(m)
   }
 
@@ -651,7 +651,7 @@ export class MediaMessage extends Message {
     }
 
     // FIXME: decoupling needed
-    this.bridge = (Config.puppetInstance() as PuppetWeb)
+    this.bridge = (config.puppetInstance() as PuppetWeb)
                     .bridge
   }
 
@@ -801,7 +801,7 @@ export class MediaMessage extends Message {
     try {
       await this.ready()
       // FIXME: decoupling needed
-      const cookies = await (Config.puppetInstance() as PuppetWeb).browser.readCookie()
+      const cookies = await (config.puppetInstance() as PuppetWeb).browser.readCookie()
       if (!this.obj.url) {
         throw new Error('no url')
       }
diff --git a/src/puppet-web/browser-driver.ts b/src/puppet-web/browser-driver.ts
index bc999bcffd61bc8f806ceb22099e07b357b99e96..0855c2c7c9935fa6b37501099a9a2c372b0e40db 100644
--- a/src/puppet-web/browser-driver.ts
+++ b/src/puppet-web/browser-driver.ts
@@ -27,7 +27,7 @@ import {
 }                             from 'selenium-webdriver'
 
 import {
-  Config,
+  config,
   HeadName,
   log,
 }                             from '../config'
@@ -113,9 +113,9 @@ export class BrowserDriver {
         '--no-sandbox',
       ],  // issue #26 for run inside docker
     }
-    if (Config.dockerMode) {
+    if (config.dockerMode) {
       log.verbose('PuppetWebBrowserDriver', 'getChromeDriver() wechaty in docker confirmed(should not show this in CI)')
-      options['binary'] = Config.CMD_CHROMIUM
+      options['binary'] = config.CMD_CHROMIUM
     } else {
       /**
        * https://github.com/Chatie/wechaty/pull/416
@@ -224,7 +224,7 @@ export class BrowserDriver {
       // , '--ssl-client-certificate-file=cert.pem' //
     ]
 
-    if (Config.debug) {
+    if (config.debug) {
       phantomjsArgs.push('--remote-debugger-port=8080') // XXX: be careful when in production env.
       phantomjsArgs.push('--webdriver-loglevel=DEBUG')
       // phantomjsArgs.push('--webdriver-logfile=webdriver.debug.log')
diff --git a/src/puppet-web/browser.ts b/src/puppet-web/browser.ts
index 7899a1ab628f3ac9bdd8e8693d87ca22fcdbd14f..2442ee047ce5c9c1fcf8e974cc70bbc8b6b36260 100644
--- a/src/puppet-web/browser.ts
+++ b/src/puppet-web/browser.ts
@@ -26,7 +26,7 @@ import { StateSwitch }  from 'state-switch'
 const retryPromise  = require('retry-promise').default // https://github.com/olalonde/retry-promise
 
 import {
-  Config,
+  config,
   HeadName,
   log,
 }                         from '../config'
@@ -53,7 +53,7 @@ export class Browser extends EventEmitter {
 
   constructor(
     private setting: BrowserSetting = {
-      head: Config.head,
+      head: config.head,
       sessionFile: '',
     },
   ) {
diff --git a/src/puppet-web/friend-request.spec.ts b/src/puppet-web/friend-request.spec.ts
index dbb0041685343ebf46a485aa65fb5e245f3b1a82..09e3f2437ef44ed15441aec0fefcfa157a6cdd02 100644
--- a/src/puppet-web/friend-request.spec.ts
+++ b/src/puppet-web/friend-request.spec.ts
@@ -18,13 +18,13 @@
  */
 import { test }               from 'ava'
 
-import Config                 from '../config'
+import config                 from '../config'
 import Contact                from '../contact'
 import Message                from '../message'
 import Puppet                 from '../puppet'
 import PuppetWebFriendRequest from './friend-request'
 
-Config.puppetInstance({
+config.puppetInstance({
   userId: 'xxx',
 } as Puppet)
 
diff --git a/src/puppet-web/friend-request.ts b/src/puppet-web/friend-request.ts
index 59bca475d3c1673b49b02885825288665ad9e23f..556b622759b48675363d58c1eeae36906dadacf0 100644
--- a/src/puppet-web/friend-request.ts
+++ b/src/puppet-web/friend-request.ts
@@ -30,7 +30,7 @@ const retryPromise  = require('retry-promise').default
 
 import { Contact }    from '../contact'
 import {
-  Config,
+  config,
   RecommendInfo,
   log,
 }                     from '../config'
@@ -97,7 +97,7 @@ export class PuppetWebFriendRequest extends FriendRequest {
       this.hello = hello
     }
 
-    return Config.puppetInstance()
+    return config.puppetInstance()
                 .friendRequestSend(contact, hello)
   }
 
@@ -108,7 +108,7 @@ export class PuppetWebFriendRequest extends FriendRequest {
       throw new Error('request is not a `receive` type. it is a ' + this.type + ' type')
     }
 
-    const ret = await Config.puppetInstance()
+    const ret = await config.puppetInstance()
                             .friendRequestAccept(this.contact, this.ticket)
 
     const max = 20
diff --git a/src/puppet-web/puppet-web.ts b/src/puppet-web/puppet-web.ts
index 1d62658948e8064a79b18238381540f7a6c779e7..96aef9179b3f61ac3c89044d29e761306e816368 100644
--- a/src/puppet-web/puppet-web.ts
+++ b/src/puppet-web/puppet-web.ts
@@ -17,7 +17,7 @@
  *
  */
 import {
-  Config,
+  config,
   HeadName,
   log,
   Raven,
@@ -75,7 +75,7 @@ export class PuppetWeb extends Puppet {
     super()
 
     if (!setting.head) {
-      setting.head = Config.head
+      setting.head = config.head
     }
     this.on('watchdog', Watchdog.onFeed.bind(this))
   }
diff --git a/src/room.ts b/src/room.ts
index 9db1a3ee79458f939bbd3f662e5c59d69d9c56fe..2d1c1a1c70fdb79dbbd993747b501154e1fcda3b 100644
--- a/src/room.ts
+++ b/src/room.ts
@@ -19,7 +19,7 @@
 import { EventEmitter } from 'events'
 
 import {
-  Config,
+  config,
   Raven,
   Sayable,
   log,
@@ -134,8 +134,8 @@ export class Room extends EventEmitter implements Sayable {
     }
 
     if (!contactGetter) {
-      contactGetter = Config.puppetInstance()
-                            .getContact.bind(Config.puppetInstance())
+      contactGetter = config.puppetInstance()
+                            .getContact.bind(config.puppetInstance())
     }
     if (!contactGetter) {
       throw new Error('no contactGetter')
@@ -216,7 +216,7 @@ export class Room extends EventEmitter implements Sayable {
 
     m.room(this)
 
-    return Config.puppetInstance()
+    return config.puppetInstance()
                   .send(m)
   }
 
@@ -295,7 +295,7 @@ export class Room extends EventEmitter implements Sayable {
       throw new Error('contact not found')
     }
 
-    const n = Config.puppetInstance()
+    const n = config.puppetInstance()
                       .roomAdd(this, contact)
     return n
   }
@@ -306,7 +306,7 @@ export class Room extends EventEmitter implements Sayable {
     if (!contact) {
       throw new Error('contact not found')
     }
-    const n = await Config.puppetInstance()
+    const n = await config.puppetInstance()
                             .roomDel(this, contact)
                             .then(_ => this.delLocal(contact))
     return n
@@ -354,7 +354,7 @@ export class Room extends EventEmitter implements Sayable {
 
     if (newTopic) {
       log.verbose('Room', 'topic(%s)', newTopic)
-      Config.puppetInstance()
+      config.puppetInstance()
             .roomTopic(this, newTopic)
             .catch(e => {
               log.warn('Room', 'topic(newTopic=%s) exception: %s',
@@ -408,7 +408,7 @@ export class Room extends EventEmitter implements Sayable {
   public owner(): Contact | null {
     const ownerUin = this.obj && this.obj.ownerUin
 
-    const user = Config.puppetInstance()
+    const user = config.puppetInstance()
                       .user
 
     if (user && user.get('uin') === ownerUin) {
@@ -547,7 +547,7 @@ export class Room extends EventEmitter implements Sayable {
       throw new Error('contactList not found')
     }
 
-    return Config.puppetInstance()
+    return config.puppetInstance()
                   .roomCreate(contactList, topic)
                   .catch(e => {
                     log.error('Room', 'create() exception: %s', e && e.stack || e.message || e)
@@ -579,7 +579,7 @@ export class Room extends EventEmitter implements Sayable {
       throw new Error('unsupport topic type')
     }
 
-    const roomList = await Config.puppetInstance()
+    const roomList = await config.puppetInstance()
                                   .roomFind(filterFunction)
                                   .catch(e => {
                                     log.verbose('Room', 'findAll() rejected: %s', e.message)
diff --git a/src/wechaty.ts b/src/wechaty.ts
index 71c5b21f3e1b9b88e80478fa98b5b9a839350a21..df189496dbc292b029cd8f1846c9d055ebdb50b1 100644
--- a/src/wechaty.ts
+++ b/src/wechaty.ts
@@ -17,13 +17,11 @@
  *
  */
 import { EventEmitter } from 'events'
-import * as fs          from 'fs'
-import * as path        from 'path'
 
 import { StateSwitch }  from 'state-switch'
 
 import {
-  Config,
+  config,
   HeadName,
   PuppetName,
   Raven,
@@ -103,11 +101,7 @@ export class Wechaty extends EventEmitter implements Sayable {
    * @private
    */
   private state = new StateSwitch<'standby', 'ready'>('Wechaty', 'standby', log)
-  /**
-   * the npmVersion
-   * @private
-   */
-  private npmVersion: string = require('../package.json').version
+
   /**
    * the uuid
    * @private
@@ -134,9 +128,9 @@ export class Wechaty extends EventEmitter implements Sayable {
     super()
     log.verbose('Wechaty', 'contructor()')
 
-    setting.head    = setting.head    || Config.head
-    setting.puppet  = setting.puppet  || Config.puppet
-    setting.profile = setting.profile || Config.profile
+    setting.head    = setting.head    || config.head
+    setting.puppet  = setting.puppet  || config.puppet
+    setting.profile = setting.profile || config.profile
 
     // setting.port    = setting.port    || Config.port
 
@@ -166,39 +160,18 @@ export class Wechaty extends EventEmitter implements Sayable {
    *  console.log(Wechaty.instance().version(true))
    *  // '0.7.9'
    */
-  public version(forceNpm = false): string {
-    // TODO: use  git rev-parse HEAD  ?
-    const dotGitPath  = path.join(__dirname, '..', '.git') // only for ts-node, not for dist
-    // TODO: use git rev-parse HEAD ?
-    const gitLogCmd   = 'git'
-    const gitLogArgs  = ['log', '--oneline', '-1']
-
+  public static version(forceNpm = false): string {
     if (!forceNpm) {
-      try {
-        fs.statSync(dotGitPath).isDirectory()
-
-        const ss = require('child_process')
-                    .spawnSync(gitLogCmd, gitLogArgs, { cwd:  __dirname })
-
-        if (ss.status !== 0) {
-          throw new Error(ss.error)
-        }
-
-        const revision = ss.stdout
-                          .toString()
-                          .trim()
+      const revision = config.gitVersion()
+      if (revision) {
         return `#git[${revision}]`
-
-      } catch (e) { /* fall safe */
-        /**
-         *  1. .git not exist
-         *  2. git log fail
-         */
-        log.silly('Wechaty', 'version() form development environment is not availble: %s', e.message)
       }
     }
+    return config.npmVersion()
+  }
 
-    return this.npmVersion
+  public version(forceNpm?) {
+    return Wechaty.version(forceNpm)
   }
 
   /**
@@ -378,7 +351,7 @@ export class Wechaty extends EventEmitter implements Sayable {
     this.puppet = <Puppet>puppet // force to use base class Puppet interface for better encapsolation
 
     // set puppet instance to Wechaty Static variable, for using by Contact/Room/Message/FriendRequest etc.
-    Config.puppetInstance(puppet)
+    config.puppetInstance(puppet)
 
     await puppet.init()
     return puppet
@@ -405,7 +378,7 @@ export class Wechaty extends EventEmitter implements Sayable {
 
     const puppetBeforeDie = this.puppet
     this.puppet     = null
-    Config.puppetInstance(null)
+    config.puppetInstance(null)
 
     await puppetBeforeDie.quit()
                         .catch(e => {
diff --git a/test/contact.spec.ts b/test/contact.spec.ts
index c2dc7484cca511e4f38721d5c7fc5f9b354fc8e1..44d6a87f8708f8e3e5f08eb1d8eb538edb9245af 100644
--- a/test/contact.spec.ts
+++ b/test/contact.spec.ts
@@ -17,11 +17,11 @@
  *
  */
 import { test }   from 'ava'
-import Config     from '../src/config'
+import config     from '../src/config'
 import Contact    from '../src/contact'
 import PuppetWeb  from '../src/puppet-web'
 
-Config.puppetInstance(new PuppetWeb())
+config.puppetInstance(new PuppetWeb())
 
 test('Contact smoke testing', async t => {
   /* tslint:disable:variable-name */
diff --git a/test/docker.spec.ts b/test/docker.spec.ts
index b759b2d571839a28a05772cd0b6045ee7d4d1d01..f8bf17ff932b1abe4057f2d5bb57031002cb8441 100644
--- a/test/docker.spec.ts
+++ b/test/docker.spec.ts
@@ -22,20 +22,20 @@ import * as fs from 'fs'
 // import { execSync } from 'child_process'
 // import * as sinon from 'sinon'
 
-import Config from '../src/config'
+import config from '../src/config'
 
 /**
  * need keep this !Config.dockerMode because ava need at least one test() inside.
  *   × No tests found in test\docker.spec.js
  */
-if (Config.dockerMode) {
+if (config.dockerMode) {
 
   test('Docker smoke testing', function(t) {
     // const n = execSync('ps a | grep Xvfb | grep -v grep | wc -l').toString().replace(/\n/, '', 'g')
     // t.is(parseInt(n), 1, 'should has Xvfb started')
     t.notThrows(() => {
       // fs.accessSync(Config.CMD_CHROMIUM, fs['X_OK'])
-      fs.statSync(Config.CMD_CHROMIUM).isFile()
+      fs.statSync(config.CMD_CHROMIUM).isFile()
     }, 'should exist xvfb-chrome exectable')
   })
 
diff --git a/test/puppet-web/browser.spec.ts b/test/puppet-web/browser.spec.ts
index f6be2fb7ab2811435a5cecf057a964bc4709dc6e..9e83699fb46cf03ee71984c650992f94c42f8e8c 100644
--- a/test/puppet-web/browser.spec.ts
+++ b/test/puppet-web/browser.spec.ts
@@ -20,7 +20,7 @@ import * as fs  from 'fs'
 import { test } from 'ava'
 
 import {
-  Config,
+  config,
   log,
 }               from '../../'
 
@@ -31,7 +31,7 @@ import {
 const TEST_DOMAIN = 'www.chatie.io'
 const TEST_URL = 'https://' + TEST_DOMAIN
 
-const PROFILE = Config.DEFAULT_PROFILE + '-' + process.pid + '-'
+const PROFILE = config.DEFAULT_PROFILE + '-' + process.pid + '-'
 let profileCounter = 1
 
 test('Cookie smoke testing', async t => {
@@ -105,7 +105,7 @@ test('Cookie save/load', async t => {
   const profileName = PROFILE + (profileCounter++)
 
   let browser = new Browser({
-      head:         Config.head,
+      head:         config.head,
       sessionFile:  profileName,
   })
 
@@ -179,7 +179,7 @@ test('Cookie save/load', async t => {
      */
 
     browser = new Browser({
-      head:         Config.head,
+      head:         config.head,
       sessionFile:  profileName,
     })
 
diff --git a/test/puppet-web/puppet-web.spec.ts b/test/puppet-web/puppet-web.spec.ts
index 1cf2d7b9085e9f2d80a767872eae35fad4695aa5..94fd62bf6a27e070343b9288f9e1a67347e2be75 100644
--- a/test/puppet-web/puppet-web.spec.ts
+++ b/test/puppet-web/puppet-web.spec.ts
@@ -19,7 +19,7 @@
 import { test } from 'ava'
 
 import {
-  Config,
+  config,
   log,
 }                 from '../../src/config'
 import PuppetWeb  from '../../src/puppet-web'
@@ -34,7 +34,7 @@ test.serial('login/logout events', async t => {
   const pw = new PuppetWeb()
   t.truthy(pw, 'should instantiated a PuppetWeb')
 
-  Config.puppetInstance(pw)
+  config.puppetInstance(pw)
 
   await pw.init()
   t.pass('should be inited')
@@ -61,7 +61,7 @@ test.serial('server/browser socketio ding', async t => {
   const puppet = new PuppetWeb()
   t.truthy(puppet, 'should instantiated a PuppetWeb')
 
-  Config.puppetInstance(puppet)
+  config.puppetInstance(puppet)
 
   const EXPECTED_DING_DATA = 'dingdong'
 
diff --git a/test/room.spec.ts b/test/room.spec.ts
index 04297b16cf2ea82198f09ec5e6f7ae7ccce3995d..a742f5ae22400cc4ded7f9b9d8a55304d3e3b84e 100644
--- a/test/room.spec.ts
+++ b/test/room.spec.ts
@@ -18,12 +18,12 @@
  */
 import { test } from 'ava'
 
-import Config     from '../src/config'
+import config     from '../src/config'
 import Contact    from '../src/contact'
 import PuppetWeb  from '../src/puppet-web'
 import Room       from '../src/room'
 
-Config.puppetInstance(new PuppetWeb())
+config.puppetInstance(new PuppetWeb())
 // Room.attach(new PuppetWeb())
 
 // test('Room smoke testing', async t => {
@@ -105,11 +105,11 @@ test('Room smoking test', async t => {
 
   let puppet
   try {
-    puppet = Config.puppetInstance()
+    puppet = config.puppetInstance()
     puppet.getContact = mockContactGetter
   } catch (err) {
     puppet = { getContact: mockContactGetter }
-    Config.puppetInstance(puppet)
+    config.puppetInstance(puppet)
   }
   await r.ready()
 
diff --git a/test/wechaty.spec.ts b/test/wechaty.spec.ts
index cca2a4decdfcefc614112d2815b62a27d19115cf..e51a7d72860e599f8c62310fd1fe046d1759bd96 100644
--- a/test/wechaty.spec.ts
+++ b/test/wechaty.spec.ts
@@ -19,7 +19,7 @@
 import { test } from 'ava'
 
 import {
-  Config,
+  config,
   Contact,
   FriendRequest,
   IoClient,
@@ -54,8 +54,8 @@ test('Wechaty Framework', t => {
 })
 
 test('Wechaty Config setting', t => {
-  t.truthy(Config                 , 'should export Config')
-  t.truthy(Config.DEFAULT_HEAD    , 'should has DEFAULT_HEAD')
-  t.truthy(Config.DEFAULT_PUPPET  , 'should has DEFAULT_PUPPET')
-  t.truthy(Config.DEFAULT_PORT    , 'should has DEFAULT_PORT')
+  t.truthy(config                 , 'should export Config')
+  t.truthy(config.DEFAULT_HEAD    , 'should has DEFAULT_HEAD')
+  t.truthy(config.DEFAULT_PUPPET  , 'should has DEFAULT_PUPPET')
+  t.truthy(config.DEFAULT_PORT    , 'should has DEFAULT_PORT')
 })