Python buildpacks updated to uv 0.9.5

Change effective on 22 October 2025

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

  • uv updated from 0.8.23 to 0.9.5 (changelog)

If you have not used the package manager uv before, we highly recommend giving it a try - it supports lockfiles, is extremely fast, and is actively maintained by a full-time team! Learn more in our blog post Heroku Adds Support for uv.