Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 08 July 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 apt from version 1.6.13 to 1.6.14
  • Updated apt-transport-https from version 1.6.13 to 1.6.14
  • Updated apt-utils from version 1.6.13 to 1.6.14
  • Updated libapt-inst2.0 from version 1.6.13 to 1.6.14
  • Updated libapt-pkg5.0 from version 1.6.13 to 1.6.14
  • Updated libavahi-client3 from version 0.7-3.1ubuntu1.2 to 0.7-3.1ubuntu1.3
  • Updated libavahi-common-data from version 0.7-3.1ubuntu1.2 to 0.7-3.1ubuntu1.3
  • Updated libavahi-common3 from version 0.7-3.1ubuntu1.2 to 0.7-3.1ubuntu1.3
  • Updated libdjvulibre-text from version 3.5.27.1-8ubuntu0.3 to 3.5.27.1-8ubuntu0.4
  • Updated libdjvulibre21 from version 3.5.27.1-8ubuntu0.3 to 3.5.27.1-8ubuntu0.4

Updates to packages available at build time only

  • Updated libapt-pkg-dev from version 1.6.13 to 1.6.14
  • Updated libdjvulibre-dev from version 3.5.27.1-8ubuntu0.3 to 3.5.27.1-8ubuntu0.4

Stack: heroku-20

  • Updated apt from version 2.0.5 to 2.0.6
  • Updated apt-transport-https from version 2.0.5 to 2.0.6
  • Updated apt-utils from version 2.0.5 to 2.0.6
  • Updated libapt-pkg6.0 from version 2.0.5 to 2.0.6
  • Updated libavahi-client3 from version 0.7-4ubuntu7 to 0.7-4ubuntu7.1
  • Updated libavahi-common-data from version 0.7-4ubuntu7 to 0.7-4ubuntu7.1
  • Updated libavahi-common3 from version 0.7-4ubuntu7 to 0.7-4ubuntu7.1
  • Updated libpython3.8-minimal from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04
  • Updated libpython3.8-stdlib from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04
  • Updated libuv1 from version 1.34.2-1ubuntu1.1 to 1.34.2-1ubuntu1.3
  • Updated python3.8 from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04
  • Updated python3.8-minimal from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04

Updates to packages available at build time only

  • Updated libapt-pkg-dev from version 2.0.5 to 2.0.6
  • Updated libpython3.8 from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04
  • Updated libpython3.8-dev from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04
  • Updated libuv1-dev from version 1.34.2-1ubuntu1.1 to 1.34.2-1ubuntu1.3
  • Updated python3.8-dev from version 3.8.5-1~20.04.3 to 3.8.10-0ubuntu1~20.04