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Ruby 2.1.7 now available on Heroku
Change effective on 18 August 2015
Ruby v2.1.7 is now available on Heroku. To run your app using this version of Ruby, add the following ruby
directive to your Gemfile:
ruby "2.1.7"
Ruby 2.1.6 Deprecated
Following the updated Ruby Version Policy, there will be no additional patches to “2.1.6” hence Heroku will deprecate its support. Ruby 2.1.7 replaces 2.1.6 on the Heroku platform and you are recommended to upgrade your application to “2.1.7” for the most stable up-to-date version available.