Heroku-24 stack is now generally available

Change effective on 24 June 2024

Heroku-24, our stack based on Ubuntu 24.04 Long Term Support, is now generally available. It will be supported until the end of April 2029.

The Heroku-22 stack remains the default stack for newly created applications until further notice.

If your organization uses Review Apps or Heroku CI, we recommend testing Heroku-24 by defining your stack in app.json:

{
  "stack": "heroku-24"
}

Existing apps can be upgraded by running this command and pushing a new build:

$ heroku stack:set heroku-24

The Heroku-24 stack article contains a list of changes over the Heroku-22 stack. Instructions for upgrading and testing a new stack with your app also contain information specific to Heroku-24.