diff --git a/README.md b/README.md
index 114e3ad..9d70bfe 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ INSTALL
 ---------------------------------------
 
 ```
-$ npm install --save-dev babel-preset-power-assert
+$ npm install --save-dev babel-preset-power-assert power-assert
 ```