Heroku Changelog Ruby 2.1.0 rc1 now supported on Heroku

Change effective on 20 December 2013

Ruby v2.1.0 rc1 is now available on Heroku. To run your app using this preview-version of Ruby, add the following ruby directive to your Gemfile:

ruby "2.1.0"

Note: This version of Ruby is not suitable for production applications. However, it can be used to test that your application is ready for December release of Ruby 2.1.0 and to provide feedback to the Ruby core team.