Heroku-20 stack is now available in beta

Change effective on 22 October 2020

Heroku-20, our stack based on Ubuntu 20.04 Long Term Support, is now in beta.

If your organization uses review apps, we recommend testing Heroku-20 by defining your stack in app.json:

{
   "stack": "heroku-20"
}

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

$ heroku stack:set heroku-20

The Heroku-20 stack article contains a list of changes over the Heroku-18 stack. Instructions for upgrading and testing a new stack with your app also contain information specific to Heroku-20.