README.md in quality-23.0.0 vs README.md in quality-23.0.1

- old
+ new

@@ -51,10 +51,10 @@
 
 
 ## How to use - as part of a Ruby-based Rakefile
 
 ```bash
-$ brew install cmake # OS X
+$ brew install cmake icu4c # OS X
 $ gem install quality
 ```
 
 or in your Gemfile:
 