Additional ResourcesHomeElementsProductsPricingCareersHelpStatusEventsPodcastsCompliance CenterHeroku BlogHeroku Blog Find out what's new with Heroku on our blog. Visit Blog Ruby 2.2.4 now available on HerokuChange effective on 16 December 2015 Ruby v2.2.4 is now available on Heroku. To run your app using this version of Ruby, add the following ruby directive to your Gemfile: ruby "2.2.4" Ruby 2.2