diff --git a/README.md b/README.md
index 571b2e2b..bda87073 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ For downloads, documentation and the developer API head to: https://hyperterm.or
 (NOTE: only on macOS) With [Homebrew](http://brew.sh/) and [Homebrew Cask](https://caskroom.github.io/) installed, you can run this command:
 
 ```bash
+$ brew cask update
 $ brew cask install hyperterm
 ```