Heroku-16, Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 11 January 2021

We have updated the heroku-16, 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.

The Heroku-16 stack is deprecated and will be end-of-life on May 1st, 2021. Please upgrade to a newer stack as soon as possible. See the Heroku-16 End-Of-Life FAQ for more details.

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-16

  • Updated ghostscript from version 9.26~dfsg+0-0ubuntu0.16.04.13 to 9.26~dfsg+0-0ubuntu0.16.04.14
  • Updated libgs9 from version 9.26~dfsg+0-0ubuntu0.16.04.13 to 9.26~dfsg+0-0ubuntu0.16.04.14
  • Updated libgs9-common from version 9.26~dfsg+0-0ubuntu0.16.04.13 to 9.26~dfsg+0-0ubuntu0.16.04.14
  • Updated libopenexr22 from version 2.2.0-10ubuntu2.3 to 2.2.0-10ubuntu2.4
  • Updated libp11-kit0 from version 0.23.2-5~ubuntu16.04.1 to 0.23.2-5~ubuntu16.04.2
  • Updated linux-libc-dev from version 4.4.0-197.229 to 4.4.0-198.230
  • Updated tzdata from version 2020d-0ubuntu0.16.04 to 2020f-0ubuntu0.16.04

Updates to packages available at build time only

  • Updated libopenexr-dev from version 2.2.0-10ubuntu2.3 to 2.2.0-10ubuntu2.4
  • Updated libp11-kit-dev from version 0.23.2-5~ubuntu16.04.1 to 0.23.2-5~ubuntu16.04.2

Stack: heroku-18

  • Updated ghostscript from version 9.26~dfsg+0-0ubuntu0.18.04.13 to 9.26~dfsg+0-0ubuntu0.18.04.14
  • Updated libgs9 from version 9.26~dfsg+0-0ubuntu0.18.04.13 to 9.26~dfsg+0-0ubuntu0.18.04.14
  • Updated libgs9-common from version 9.26~dfsg+0-0ubuntu0.18.04.13 to 9.26~dfsg+0-0ubuntu0.18.04.14
  • Updated libopenexr22 from version 2.2.0-11.1ubuntu1.3 to 2.2.0-11.1ubuntu1.4
  • Updated libp11-kit0 from version 0.23.9-2 to 0.23.9-2ubuntu0.1
  • Updated libsasl2-2 from version 2.1.27~101-g0780600+dfsg-3ubuntu2.1 to 2.1.27~101-g0780600+dfsg-3ubuntu2.3
  • Updated libsasl2-modules from version 2.1.27~101-g0780600+dfsg-3ubuntu2.1 to 2.1.27~101-g0780600+dfsg-3ubuntu2.3
  • Updated libsasl2-modules-db from version 2.1.27~101-g0780600+dfsg-3ubuntu2.1 to 2.1.27~101-g0780600+dfsg-3ubuntu2.3
  • Updated linux-libc-dev from version 4.15.0-128.131 to 4.15.0-130.134
  • Updated tzdata from version 2020d-0ubuntu0.18.04 to 2020f-0ubuntu0.18.04

Updates to packages available at build time only

  • Updated libgs-dev from version 9.26~dfsg+0-0ubuntu0.18.04.13 to 9.26~dfsg+0-0ubuntu0.18.04.14
  • Updated libopenexr-dev from version 2.2.0-11.1ubuntu1.3 to 2.2.0-11.1ubuntu1.4
  • Updated libp11-kit-dev from version 0.23.9-2 to 0.23.9-2ubuntu0.1
  • Updated libsasl2-dev from version 2.1.27~101-g0780600+dfsg-3ubuntu2.1 to 2.1.27~101-g0780600+dfsg-3ubuntu2.3

Stack: heroku-20

  • Updated libopenexr24 from version 2.3.0-6ubuntu0.2 to 2.3.0-6ubuntu0.3
  • Updated libopenjp2-7 from version 2.3.1-1ubuntu4 to 2.3.1-1ubuntu4.20.04.1
  • Updated libp11-kit0 from version 0.23.20-1build1 to 0.23.20-1ubuntu0.1
  • Updated linux-libc-dev from version 5.4.0-58.64 to 5.4.0-60.67
  • Updated tzdata from version 2020d-0ubuntu0.20.04 to 2020f-0ubuntu0.20.04

Updates to packages available at build time only

  • Updated libopenexr-dev from version 2.3.0-6ubuntu0.2 to 2.3.0-6ubuntu0.3
  • Updated libp11-kit-dev from version 0.23.20-1build1 to 0.23.20-1ubuntu0.1