diff --git a/README.rdoc b/README.rdoc
index 7b44328..4405dfe 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -31,7 +31,7 @@ If you a looking for the old version for Rails 3.x go here[http://github.com/adz
 == Installation
 
   # in Gemfile
-  gem 'validates_timeliness', '~> 4.0'
+  gem 'validates_timeliness', '~> 4.1'
 
   # Run bundler
   $ bundle install