v291

• Updated uv from 0.7.13 to 0.7.20. (#1827 and #1829)
• The build now errors if the Python buildpack has been run multiple times in the same build. This replaces the warning displayed since December 2024. (#1830)
• The build now errors if an existing .heroku/python/ directory is found in the app source. This replaces the warning displayed since December 2024. (#1830)

v290

• Updated uv from 0.7.10 to 0.7.13. (#1819)

v289

• The Python 3.13 version alias now resolves to Python 3.13.5. (#1814)

v288

• The Python 3.13 version alias now resolves to Python 3.13.4. (#1810)
• The Python 3.12 version alias now resolves to Python 3.12.11. (#1810)
• The Python 3.11 version alias now resolves to Python 3.11.13. (#1810)
• The Python 3.10 version alias now resolves to Python 3.10.18. (#1810)
• The Python 3.9 version alias now resolves to Python 3.9.23. (#1810)
• Updated uv from 0.7.6 to 0.7.10. (#1811)

v287

• Updated pip from 25.0.1 to 25.1.1. (#1795)
• Updated Poetry from 2.1.2 to 2.1.3. (#1797)
• Updated uv from 0.7.3 to 0.7.6. (#1800 and #1803)

v286

• Added support for the package manager uv. (#1791)

v285

• Improved internal buildpack metrics handling of attributes that contain newline characters. (#1792)

v284

• Fixed parsing of runtime.txt and .python-version files that contain CRLF characters. (#1789)

v283

• Added a warning when an app doesn't specify a Python version and instead relies upon the default/cached version. (#1787)
• Improved the instructions for migrating from runtime.txt to .python-version. (#1783)
• Improved the error messages shown when .python-version, runtime.txt or Pipfile.lock contain an invalid Python version. (#1783 and #1786)
• Improved the rendering of the error message shown when .python-version or runtime.txt contain stray invisible characters (such as ASCII control codes). (#1783)
• Improved the upgrade instructions shown for EOL and unsupported Python versions. (#1783 and #1786)
• Improved the error messages shown when no Python package manager files are found. (#1787)

v282

• Removed support for Heroku-20. (#1778)