Heroku-18 and Heroku-20 stack images updated

Change effective on 04 April 2022

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 libpython2.7-minimal from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated libpython2.7-stdlib from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated libpython3.6-minimal from version 3.6.9-1~18.04ubuntu1.6 to 3.6.9-1~18.04ubuntu1.7
• Updated libpython3.6-stdlib from version 3.6.9-1~18.04ubuntu1.6 to 3.6.9-1~18.04ubuntu1.7
• Updated linux-libc-dev from version 4.15.0-173.182 to 4.15.0-175.184
• Updated python2.7 from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated python2.7-minimal from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated python3.6 from version 3.6.9-1~18.04ubuntu1.6 to 3.6.9-1~18.04ubuntu1.7
• Updated python3.6-minimal from version 3.6.9-1~18.04ubuntu1.6 to 3.6.9-1~18.04ubuntu1.7
• Updated rsync from version 3.1.2-2.1ubuntu1.3 to 3.1.2-2.1ubuntu1.4
• Updated tzdata from version 2021e-0ubuntu0.18.04 to 2022a-0ubuntu0.18.04
• Updated zlib1g from version 1:1.2.11.dfsg-0ubuntu2 to 1:1.2.11.dfsg-0ubuntu2.1

Updates to packages available at build time only

• Updated libpython2.7 from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated libpython2.7-dev from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated python2.7-dev from version 2.7.17-1~18.04ubuntu1.6 to 2.7.17-1~18.04ubuntu1.7
• Updated zlib1g-dev from version 1:1.2.11.dfsg-0ubuntu2 to 1:1.2.11.dfsg-0ubuntu2.1

Stack: heroku-20

• Updated libpq5 from version 14.2-1.pgdg20.04+1 to 14.2-1.pgdg20.04+1+b1
• Updated libpython3.8-minimal from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated libpython3.8-stdlib from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated linux-libc-dev from version 5.4.0-105.119 to 5.4.0-107.121
• Updated postgresql-client-14 from version 14.2-1.pgdg20.04+1 to 14.2-1.pgdg20.04+1+b1
• Updated python3.8 from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated python3.8-minimal from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated rsync from version 3.1.3-8ubuntu0.2 to 3.1.3-8ubuntu0.3
• Updated tzdata from version 2021e-0ubuntu0.20.04 to 2022a-0ubuntu0.20.04
• Updated zlib1g from version 1:1.2.11.dfsg-2ubuntu1.2 to 1:1.2.11.dfsg-2ubuntu1.3

Updates to packages available at build time only

• Removed clang-9
• Removed libclang-common-9-dev
• Removed libclang-cpp9
• Removed libllvm9
• Removed llvm-9
• Removed llvm-9-dev
• Removed llvm-9-runtime
• Removed llvm-9-tools
• Updated libpq-dev from version 14.2-1.pgdg20.04+1 to 14.2-1.pgdg20.04+1+b1
• Updated libpython3.8 from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated libpython3.8-dev from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated postgresql-server-dev-14 from version 14.2-1.pgdg20.04+1 to 14.2-1.pgdg20.04+1+b1
• Updated python3.8-dev from version 3.8.10-0ubuntu1~20.04.2 to 3.8.10-0ubuntu1~20.04.4
• Updated zlib1g-dev from version 1:1.2.11.dfsg-2ubuntu1.2 to 1:1.2.11.dfsg-2ubuntu1.3
• Added clang-10 version 1:10.0.0-4ubuntu1
• Added libclang-common-10-dev version 1:10.0.0-4ubuntu1
• Added libclang-cpp10 version 1:10.0.0-4ubuntu1
• Added libclang1-10 version 1:10.0.0-4ubuntu1
• Added libllvm10 version 1:10.0.0-4ubuntu1
• Added llvm-10 version 1:10.0.0-4ubuntu1
• Added llvm-10-dev version 1:10.0.0-4ubuntu1
• Added llvm-10-runtime version 1:10.0.0-4ubuntu1
• Added llvm-10-tools version 1:10.0.0-4ubuntu1