diff --git a/README.rdoc b/README.rdoc
index 6665dc5..632abc7 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -5,9 +5,9 @@
 
 == Description
 
-Complete validation of dates, times and datetimes for Rails 3.x and ActiveModel.
+Complete validation of dates, times and datetimes for Rails 4.x and ActiveModel.
 
-If you a looking for the old version for Rails 2.x go here[http://github.com/adzap/validates_timeliness/tree/v2.3].
+If you a looking for the old version for Rails 3.x go here[http://github.com/adzap/validates_timeliness/tree/v3.x].
 
 
 == Features
@@ -30,7 +30,7 @@ If you a looking for the old version for Rails 2.x go here[http://github.com/adz
 == Installation
 
   # in Gemfile
-  gem 'validates_timeliness', '~> 3.0'
+  gem 'validates_timeliness', '~> 4.0'
 
   # Run bundler
   $ bundle install