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

Change effective on 28 April 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 distro-info-data from version 0.28ubuntu0.16 to 0.28ubuntu0.17
  • Updated libhogweed4 from version 3.2-1ubuntu0.16.04.1 to 3.2-1ubuntu0.16.04.2
  • Updated libnettle6 from version 3.2-1ubuntu0.16.04.1 to 3.2-1ubuntu0.16.04.2
  • Updated libruby2.3 from version 2.3.1-2~ubuntu16.04.15 to 2.3.1-2~ubuntu16.04.16
  • Updated libseccomp2 from version 2.4.3-1ubuntu3.16.04.3 to 2.5.1-1ubuntu1~16.04.1
  • Updated libsystemd0 from version 229-4ubuntu21.29 to 229-4ubuntu21.31
  • Updated libudev1 from version 229-4ubuntu21.29 to 229-4ubuntu21.31
  • Updated linux-libc-dev from version 4.4.0-206.238 to 4.4.0-210.242
  • Updated ruby2.3 from version 2.3.1-2~ubuntu16.04.15 to 2.3.1-2~ubuntu16.04.16
  • Updated systemd from version 229-4ubuntu21.29 to 229-4ubuntu21.31
  • Updated systemd-sysv from version 229-4ubuntu21.29 to 229-4ubuntu21.31

Updates to packages available at build time only

  • Updated libseccomp-dev from version 2.4.3-1ubuntu3.16.04.3 to 2.5.1-1ubuntu1~16.04.1
  • Updated libsystemd-dev from version 229-4ubuntu21.29 to 229-4ubuntu21.31
  • Updated libudev-dev from version 229-4ubuntu21.29 to 229-4ubuntu21.31
  • Updated nettle-dev from version 3.2-1ubuntu0.16.04.1 to 3.2-1ubuntu0.16.04.2
  • Updated ruby2.3-dev from version 2.3.1-2~ubuntu16.04.15 to 2.3.1-2~ubuntu16.04.16

Stack: heroku-18

  • Updated apt from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated apt-transport-https from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated apt-utils from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated distro-info-data from version 0.37ubuntu0.9 to 0.37ubuntu0.10
  • Updated libapt-inst2.0 from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated libapt-pkg5.0 from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated libhogweed4 from version 3.4-1 to 3.4-1ubuntu0.1
  • Updated libnettle6 from version 3.4-1 to 3.4-1ubuntu0.1
  • Updated libruby2.5 from version 2.5.1-1ubuntu1.8 to 2.5.1-1ubuntu1.9
  • Updated libseccomp2 from version 2.4.3-1ubuntu3.18.04.3 to 2.5.1-1ubuntu1~18.04.1
  • Updated libsystemd0 from version 237-3ubuntu10.45 to 237-3ubuntu10.46
  • Updated libudev1 from version 237-3ubuntu10.45 to 237-3ubuntu10.46
  • Updated linux-libc-dev from version 4.15.0-140.144 to 4.15.0-142.146
  • Updated ruby2.5 from version 2.5.1-1ubuntu1.8 to 2.5.1-1ubuntu1.9

Updates to packages available at build time only

  • Updated libapt-pkg-dev from version 1.6.12ubuntu0.2 to 1.6.13
  • Updated libseccomp-dev from version 2.4.3-1ubuntu3.18.04.3 to 2.5.1-1ubuntu1~18.04.1
  • Updated libsystemd-dev from version 237-3ubuntu10.45 to 237-3ubuntu10.46
  • Updated libudev-dev from version 237-3ubuntu10.45 to 237-3ubuntu10.46
  • Updated nettle-dev from version 3.4-1 to 3.4-1ubuntu0.1
  • Updated ruby2.5-dev from version 2.5.1-1ubuntu1.8 to 2.5.1-1ubuntu1.9

Stack: heroku-20

  • Updated apt from version 2.0.4 to 2.0.5
  • Updated apt-transport-https from version 2.0.4 to 2.0.5
  • Updated apt-utils from version 2.0.4 to 2.0.5
  • Updated distro-info-data from version 0.43ubuntu1.4 to 0.43ubuntu1.5
  • Updated libapt-pkg6.0 from version 2.0.4 to 2.0.5
  • Updated libc-bin from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated libc-dev-bin from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated libc6 from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated libc6-dev from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated libhogweed5 from version 3.5.1+really3.5.1-2 to 3.5.1+really3.5.1-2ubuntu0.1
  • Updated libldap-2.4-2 from version 2.4.49+dfsg-2ubuntu1.7 to 2.4.49+dfsg-2ubuntu1.8
  • Updated libldap-common from version 2.4.49+dfsg-2ubuntu1.7 to 2.4.49+dfsg-2ubuntu1.8
  • Updated libnettle7 from version 3.5.1+really3.5.1-2 to 3.5.1+really3.5.1-2ubuntu0.1
  • Updated libprocps8 from version 2:3.3.16-1ubuntu2 to 2:3.3.16-1ubuntu2.1
  • Updated libruby2.7 from version 2.7.0-5ubuntu1.3 to 2.7.0-5ubuntu1.4
  • Updated libseccomp2 from version 2.4.3-1ubuntu3.20.04.3 to 2.5.1-1ubuntu1~20.04.1
  • Updated libsystemd0 from version 245.4-4ubuntu3.5 to 245.4-4ubuntu3.6
  • Updated libudev1 from version 245.4-4ubuntu3.5 to 245.4-4ubuntu3.6
  • Updated linux-libc-dev from version 5.4.0-70.78 to 5.4.0-72.80
  • Updated locales from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated procps from version 2:3.3.16-1ubuntu2 to 2:3.3.16-1ubuntu2.1
  • Updated ruby2.7 from version 2.7.0-5ubuntu1.3 to 2.7.0-5ubuntu1.4

Updates to packages available at build time only

  • Updated libapt-pkg-dev from version 2.0.4 to 2.0.5
  • Updated libc6-i386 from version 2.31-0ubuntu9.2 to 2.31-0ubuntu9.3
  • Updated libldap2-dev from version 2.4.49+dfsg-2ubuntu1.7 to 2.4.49+dfsg-2ubuntu1.8
  • Updated libseccomp-dev from version 2.4.3-1ubuntu3.20.04.3 to 2.5.1-1ubuntu1~20.04.1
  • Updated libsystemd-dev from version 245.4-4ubuntu3.5 to 245.4-4ubuntu3.6
  • Updated libudev-dev from version 245.4-4ubuntu3.5 to 245.4-4ubuntu3.6
  • Updated nettle-dev from version 3.5.1+really3.5.1-2 to 3.5.1+really3.5.1-2ubuntu0.1
  • Updated ruby2.7-dev from version 2.7.0-5ubuntu1.3 to 2.7.0-5ubuntu1.4