fix README.md
diff --git a/README.md b/README.md
index 15007ab..1c9c3a5 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ## Install
 
 ```
-npm install weex-loader babel-loader babel-preset-es2015 babel-runtime babel-plugin-transform-runtime --save
+npm install weex-loader@0.3.0-alpha babel-loader babel-preset-es2015 babel-runtime babel-plugin-transform-runtime --save
 ```
 
 ## Features