Python buildpacks updated to Poetry 2.2.0 and uv 0.8.18
Change effective on 19 September 2025
We have updated the package managers used during the build of Python apps as follows:
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.