diff --git a/README.md b/README.md
index 3486db0..5d93270 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ Browse caught messages, preview rendered HTML, and inspect client compatibility
 
 ```sh
 brew tap mailtrap/local
+brew trust --formula mailtrap/local/mailtrap-local
 brew install mailtrap-local
 brew services start mailtrap-local
 ```