JRuby version 10.0.1.0 is now available

Change effective on 18 July 2025

JRuby v10.0.1.0 is now available on Heroku. To run your app using this version of Ruby, add the following ruby directive to your Gemfile:

ruby "3.4.2", engine: "jruby", engine_version: "10.0.1.0"

The JRuby release notes can be found on the JRuby website.