Migrating Your Ruby Apps to the Latest Stack | Heroku

Do you run Rails or pure Ruby applications on Heroku? If so, it's important to be aware of upcoming end-of-life (EOL) dates for both your stack and your Ruby version. The Heroku-20 stack, built on Ubuntu 20.04 LTS, will reach EOL for standard support in April 2025. Ruby 2.7 has already passed its EOL, meaning it's no longer receiving critical security updates. Continuing to run your app with either an outdated Ruby version or an unsupported Heroku stack exposes your application to increasing security and stability risks. In this article, we’ll cover: What the Heroku-20 EOL means for your application. Risks of continuing with Ruby 2.7, especially in combination with Heroku-20. Recommendations and strategies for securely migrating your stack and Ruby version. But first, here are the commands you can run to determine your current Heroku stack and Ruby version:.