Migrate apps from Heroku with near-zero downtime.
Heroku Migration DocsFebruary 11, 2026
Improved
Updated version defaults: Python to 3.14.3, uv to 0.10.2
Newly created Python services now use Python 3.14.3 and uv version 0.10.2 by default. You can always specify a different version of both Python and uv.
Existing Python services keep their original default versions to prevent breaking changes.