diff --git a/doc/00-intro.md b/doc/00-intro.md
index ea62f2299..451e9c359 100644
--- a/doc/00-intro.md
+++ b/doc/00-intro.md
@@ -99,7 +99,7 @@ Composer is part of the homebrew-php project.
 brew update
 brew tap josegonzalez/homebrew-php
 brew tap homebrew/versions
-brew install php53-intl
+brew install php55-intl
 brew install josegonzalez/php/composer
 ```