diff --git a/README.md b/README.md
index fece2fe4..75ceef63 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ So on, you can install from Homebrew:
 
 ```
 $ brew update
-$ brew cask install whalebird
+$ brew install --cask whalebird
 ```
 
 :sparkles: Thanks to [@singingwolfboy](https://github.com/singingwolfboy) for adding it to [homebrew-cask](https://github.com/Homebrew/homebrew-cask/blob/cf568882b6e012956ca404a16be2db36ca873002/Casks/whalebird.rb).