Ruby versions 3.1.6, 3.3.2, 3.4.0-preview1

Change effective on 03 June 2024

The following Ruby versions are now available on the Heroku platform:

  • Ruby 3.1.6
  • Ruby 3.3.2
  • Ruby 3.4.0-preview1

The latest versions are on the Ruby support page.

Ruby 3.4.0-preview1 is not suitable for production applications. However, it can be used to test that your application is ready for the December release of Ruby 3.4.0 and to provide feedback to the Ruby core team. To use this preview version of Ruby include ruby "3.4.0.preview1" in the Gemfile of your application.