JRuby version 10.0.5.0 is now available

Change effective on 08 April 2026

JRuby v10.0.5.0 is now available on Heroku. To run your app using this version of Ruby, add the following ruby directive to your Gemfile:

ruby "3.4.5", engine: "jruby", engine_version: "10.0.5.0"

The JRuby release notes can be found on the JRuby website. Add a changelog item: https://devcenter.heroku.com/admin/changelog_items/new