diff --git a/README.md b/README.md
index 4ec09d6..c2f9c21 100644
--- a/README.md
+++ b/README.md
@@ -14,5 +14,5 @@ npm install heya-ctr
 For your browser-based projects I suggest to use [volo.js](http://volojs.org):
 
 ```
-volo install heya/ctr heya-ctr
+volo add -amdoff heya/ctr heya-ctr
 ```