diff --git a/docs/install/macos.md b/docs/install/macos.md
index 7b5b2970a..98e99936c 100644
--- a/docs/install/macos.md
+++ b/docs/install/macos.md
@@ -33,6 +33,7 @@ $ brew install --cask wezterm
 If you'd like to use a nightly build:
 
 ```console
+$ brew tap homebrew/cask-versions
 $ brew install --cask wezterm-nightly
 ```