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

Change effective on 13 May 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 reached end-of-life on May 1st, 2021. Today’s update is the last Heroku-16 will receive. 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 apt from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated apt-transport-https from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated apt-utils from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated bind9-host from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated dnsutils from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libapt-inst2.0 from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated libapt-pkg5.0 from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated libbind9-140 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libdns-export162 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libdns162 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libisc-export160 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libisc160 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libisccc140 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated libisccfg140 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Updated liblwres141 from version 1:9.10.3.dfsg.P4-8ubuntu1.18 to 1:9.10.3.dfsg.P4-8ubuntu1.19
  • Added libzstd1 version 1.3.1+dfsg-1~ubuntu0.16.04.1

Updates to packages available at build time only

  • Updated dpkg-dev from version 1.18.4ubuntu1.6 to 1.18.4ubuntu1.7
  • Updated libapt-pkg-dev from version 1.2.32ubuntu0.2 to 1.2.35
  • Updated libdpkg-perl from version 1.18.4ubuntu1.6 to 1.18.4ubuntu1.7

Stack: heroku-18

  • Updated bind9-host from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated dnsutils from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libbind9-160 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libdns1100 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libirs160 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libisc169 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libisccc160 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libisccfg160 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated liblwres160 from version 1:9.11.3+dfsg-1ubuntu1.14 to 1:9.11.3+dfsg-1ubuntu1.15
  • Updated libmysqlclient20 from version 5.7.33-0ubuntu0.18.04.1 to 5.7.34-0ubuntu0.18.04.1
  • Updated libsystemd0 from version 237-3ubuntu10.46 to 237-3ubuntu10.47
  • Updated libudev1 from version 237-3ubuntu10.46 to 237-3ubuntu10.47
  • Updated linux-libc-dev from version 4.15.0-142.146 to 4.15.0-143.147

Updates to packages available at build time only

  • Updated libmysqlclient-dev from version 5.7.33-0ubuntu0.18.04.1 to 5.7.34-0ubuntu0.18.04.1
  • Updated libsystemd-dev from version 237-3ubuntu10.46 to 237-3ubuntu10.47
  • Updated libudev-dev from version 237-3ubuntu10.46 to 237-3ubuntu10.47
  • Updated libunbound2 from version 1.6.7-1ubuntu2.3 to 1.6.7-1ubuntu2.4

Stack: heroku-20

  • Updated bind9-dnsutils from version 1:9.16.1-0ubuntu2.7 to 1:9.16.1-0ubuntu2.8
  • Updated bind9-host from version 1:9.16.1-0ubuntu2.7 to 1:9.16.1-0ubuntu2.8
  • Updated bind9-libs from version 1:9.16.1-0ubuntu2.7 to 1:9.16.1-0ubuntu2.8
  • Updated dnsutils from version 1:9.16.1-0ubuntu2.7 to 1:9.16.1-0ubuntu2.8
  • Updated libc-bin from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2
  • Updated libc-dev-bin from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2
  • Updated libc6 from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2
  • Updated libc6-dev from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2
  • Updated libmysqlclient21 from version 8.0.23-0ubuntu0.20.04.1 to 8.0.25-0ubuntu0.20.04.1
  • Updated linux-libc-dev from version 5.4.0-72.80 to 5.4.0-73.82
  • Updated locales from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2

Updates to packages available at build time only

  • Updated libc6-i386 from version 2.31-0ubuntu9.3 to 2.31-0ubuntu9.2
  • Updated libmysqlclient-dev from version 8.0.23-0ubuntu0.20.04.1 to 8.0.25-0ubuntu0.20.04.1
  • Updated libunbound8 from version 1.9.4-2ubuntu1.1 to 1.9.4-2ubuntu1.2
  • Updated python3-yaml from version 5.3.1-1 to 5.3.1-1ubuntu0.1