diff --git a/README.md b/README.md
index 7ec559c..d5fe934 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ Under RVM your mailcatcher command may only be available under the ruby you inst
 
 ### Rails
 
-To set up your rails app, I recommend adding this to your `environment/development.rb`:
+To set up your rails app, I recommend adding this to your `environments/development.rb`:
 
     config.action_mailer.delivery_method = :smtp
     config.action_mailer.smtp_settings = { :address => "localhost", :port => 1025 }