Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 16 December 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 libglib2.0-0 from version 2.56.4-0ubuntu0.18.04.8 to 2.56.4-0ubuntu0.18.04.9
  • Updated libpython3.6-minimal from version 3.6.9-1~18.04ubuntu1.4 to 3.6.9-1~18.04ubuntu1.6
  • Updated libpython3.6-stdlib from version 3.6.9-1~18.04ubuntu1.4 to 3.6.9-1~18.04ubuntu1.6
  • Updated libseccomp2 from version 2.5.1-1ubuntu1~18.04.1 to 2.5.1-1ubuntu1~18.04.2
  • Updated libssl1.1 from version 1.1.1-1ubuntu2.1~18.04.13 to 1.1.1-1ubuntu2.1~18.04.14
  • Updated openssl from version 1.1.1-1ubuntu2.1~18.04.13 to 1.1.1-1ubuntu2.1~18.04.14
  • Updated python3.6 from version 3.6.9-1~18.04ubuntu1.4 to 3.6.9-1~18.04ubuntu1.6
  • Updated python3.6-minimal from version 3.6.9-1~18.04ubuntu1.4 to 3.6.9-1~18.04ubuntu1.6

Updates to packages available at build time only

  • Updated libglib2.0-bin from version 2.56.4-0ubuntu0.18.04.8 to 2.56.4-0ubuntu0.18.04.9
  • Updated libglib2.0-data from version 2.56.4-0ubuntu0.18.04.8 to 2.56.4-0ubuntu0.18.04.9
  • Updated libglib2.0-dev from version 2.56.4-0ubuntu0.18.04.8 to 2.56.4-0ubuntu0.18.04.9
  • Updated libglib2.0-dev-bin from version 2.56.4-0ubuntu0.18.04.8 to 2.56.4-0ubuntu0.18.04.9
  • Updated libseccomp-dev from version 2.5.1-1ubuntu1~18.04.1 to 2.5.1-1ubuntu1~18.04.2
  • Updated libssl-dev from version 1.1.1-1ubuntu2.1~18.04.13 to 1.1.1-1ubuntu2.1~18.04.14

Stack: heroku-20

  • Updated libpython3.8-minimal from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2
  • Updated libpython3.8-stdlib from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2
  • Updated libseccomp2 from version 2.5.1-1ubuntu1~20.04.1 to 2.5.1-1ubuntu1~20.04.2
  • Updated libssl1.1 from version 1.1.1f-1ubuntu2.9 to 1.1.1f-1ubuntu2.10
  • Updated openssl from version 1.1.1f-1ubuntu2.9 to 1.1.1f-1ubuntu2.10
  • Updated python3.8 from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2
  • Updated python3.8-minimal from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2

Updates to packages available at build time only

  • Updated libpython3.8 from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2
  • Updated libpython3.8-dev from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2
  • Updated libseccomp-dev from version 2.5.1-1ubuntu1~20.04.1 to 2.5.1-1ubuntu1~20.04.2
  • Updated libssl-dev from version 1.1.1f-1ubuntu2.9 to 1.1.1f-1ubuntu2.10
  • Updated python3.8-dev from version 3.8.10-0ubuntu1~20.04.1 to 3.8.10-0ubuntu1~20.04.2