Python buildpacks updated to Pipenv 2026.5.1, Poetry 2.3.3 and uv 0.11.3

Change effective on 02 April 2026

We have updated the package managers used during the build of Python apps as follows:

  • Poetry updated from 2.3.2 to 2.3.3 (changelog)
  • uv updated from 0.10.9 to 0.11.3 (changelog)

And for Cedar-generation Python apps only:

  • Pipenv updated from 2026.0.3 to 2026.5.1 (changelog)

If you have not used the package manager uv before, we highly recommend giving it a try! Learn more in our blog post Heroku Adds Support for uv.