Vue reference issue in old sdk (#139)
diff --git a/source/guide/set-up-env.md b/source/guide/set-up-env.md
index 755edd2..ca2150c 100644
--- a/source/guide/set-up-env.md
+++ b/source/guide/set-up-env.md
@@ -21,7 +21,7 @@
$ nvm use 6.10.0
```
-And `npm` comes with Node.js, with witch you can install the Weex command line tools.
+And `npm` comes with Node.js, with which you can install the Weex command line tools.
> **NOTE: ** After upgrading the `weex-toolkit` to v1.0.8, the `npm-shrinkwrap.json` npm 5 specification has been added to lock the package dependencies, it is needed to upgrade your npm version to 5 above by command: `npm install npm @latest -g` if your version is lower than this, please check your npm version before using it.
