diff --git a/README.md b/README.md
index 489b04102ebef3eeabd0a38ec39598ce7affa0bf..10e27e1fd84af2f0d5778472b3235f6184a4c3e5 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Wechaty is a Bot Framework for Wechat **Personal** Account that helps you easy c
 
 [![Join the chat at https://gitter.im/zixia/wechaty](https://badges.gitter.im/zixia/wechaty.svg)](https://gitter.im/zixia/wechaty?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![node](https://img.shields.io/node/v/wechaty.svg?maxAge=2592000)](https://nodejs.org/)
-[![Repo Size](https://reposs.herokuapp.com/?path=wechaty/wechaty)]()
+[![Repo Size](https://reposs.herokuapp.com/?path=wechaty/wechaty)](https://github.com/wechaty/wechaty)
 
 ## Wechaty had rewritten to Typescript.
 
diff --git a/appveyor.yml b/appveyor.yml
index b6eff02f5cb5d448b53a57ec0383cf7074dbe3d1..e52d278ec877ff161ac6c4cc2d698710f9c63261 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,7 +6,6 @@ environment:
     - nodejs_version: "6"
     - nodejs_version: "7"
 
-
 # Install scripts. (runs after repo cloning)
 install:
   # Get the latest stable version of Node.js or io.js
@@ -16,10 +15,8 @@ install:
 
 # Post-install test scripts.
 test_script:
-  # Output useful info for debugging.
   - node --version
   - npm --version
-  # run tests
   - npm test
 
 # Don't actually build.
diff --git a/package.json b/package.json
index a61bbb73847b88e8353401a67a28ded01a5bdf82..898ff698d850924df37431e53bb0d9685b3f059c 100755
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "test:phantomjs.bak": "cross-env LC_ALL=C WECHATY_LOG=info WECHATY_HEAD=phantomjs ava --timeout=10m \"dist/{src,test}/**/*.spec.js\"",
     "test:chrome": "cross-env LC_ALL=C WECHATY_LOG=verbose WECHATY_HEAD=chrome ava --concurrency 0 --ext js --timeout=10m \"dist/{src,test}/**/*.spec.js\"",
     "testdev": "cross-env LC_ALL=C WECHATY_LOG=silly ava --ext ts --serial --verbose --fail-fast --timeout=3m",
-    "testdist": "WECHATY_LOG=SILLY WECHATY_HEAD=chrome ava --ext ts --verbose --fail-fast --timeout=2m",
+    "testdist": "cross-env WECHATY_LOG=SILLY WECHATY_HEAD=chrome ava --ext ts --verbose --fail-fast --timeout=2m",
     "ava": "cross-env LC_ALL=C WECHATY_LOG=verbose ts-node node_modules/.bin/ava \"{src,test}/**/*.spec.js\"",
     "start": "ts-node bin/client",
     "dev": "ts-node dev.ts",
@@ -90,7 +90,7 @@
     "ava": "^0.16.0",
     "body-parser": "^1.15.2",
     "brolog": "^0.3.10",
-    "chromedriver": "^2.23.1",
+    "chromedriver": "^2.24.1",
     "express": "^4.13.4",
     "is-ci": "^1.0.9",
     "phantomjs-prebuilt": "^2.1.13",
diff --git a/src/config.ts b/src/config.ts
index c90f31e448fe1db6c684ea6ddf1b7adfae469f34..d7ce14e5ecd246410e1771dec1c434b6fd558304 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -98,7 +98,7 @@ function isWechatyDocker() {
   }
 
   const cgroup = '/proc/1/cgroup'
-  try       { fs.statSync(cgroup) /* .isFile() */ }
+  try       { fs.statSync(cgroup).isFile() }
   catch (e) { return false }
 
   const line = execSync(`sort -n ${cgroup} | head -1`)