Change effective on 01 October 2013
Heroku now supports Node.js v0.10.20, which fixes some issues in last week’s 0.10.19 release. You can specify a version in the engines.node field of your app’s package.json file, e.g. 0.10.x.
Heroku Update
Starting November 28th, 2022, free Heroku Dynos, free Heroku Postgres, and free Heroku Data for Redis® will no longer be available.
If you have apps using any of these resources, you must upgrade to paid plans by this date to ensure your apps continue to run and to retain your data. For students, we will announce a new program by the end of September.