Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 08 November 2021

We have updated the heroku-18 and heroku-20 stack images to pick up security fixes in upstream packages. The new stack images will be rolled out automatically over the next 24 hours. You do not need to redeploy your app or manually restart your dynos.

See this Dev Center article for an overview of the packages available in each stack image.

Changelog of packages

The following packages have been changed; a separate section for each stack (if applicable) lists packages that are only available at build time, but not at runtime.

Stack: heroku-18

  • Updated libicu60 from version 60.2-3ubuntu3.1 to 60.2-3ubuntu3.2
  • Updated linux-libc-dev from version 4.15.0-161.169 to 4.15.0-162.170
  • Updated tzdata from version 2021a-2ubuntu0.18.04 to 2021e-0ubuntu0.18.04

Updates to packages available at build time only

  • Updated icu-devtools from version 60.2-3ubuntu3.1 to 60.2-3ubuntu3.2
  • Updated libicu-dev from version 60.2-3ubuntu3.1 to 60.2-3ubuntu3.2
  • Updated libiculx60 from version 60.2-3ubuntu3.1 to 60.2-3ubuntu3.2

Stack: heroku-20

  • Updated linux-libc-dev from version 5.4.0-89.100 to 5.4.0-90.101
  • Updated tzdata from version 2021a-2ubuntu0.20.04 to 2021e-0ubuntu0.20.04

Updates to packages available at build time only