Rails 4 requires at least Ruby 1.9.3 [Rails 4 Countdown to 2013] | The Remarkable Labs Blog

This post is part of a series of 31 Rails 4 articles being released each day in December 2012 . As of June 2013, Ruby 1.8.7 will no longer by maintained by the Ruby core team. It has reached its end of life and Rubyists have been asked to use Ruby 1.9 moving forward. In an announcemen...