Starting today, new Python Builds and Functions will use version 3.12 and new Ruby Builds and Functions will use version 3.3.

If you need to continue using Python 3.9 or Ruby 3.2, ensure you have 18.x selected for the Node.js Version in your project settings to use the older build image.

For Python 3.9, ensure your Pipfile and corresponding Pipfile.lock have python_version set to 3.9 exactly. Similarly, for Ruby 3.2, make sure ruby "~> 3.2.x" is defined in the ‌Gemfile‍​‍​‍‌‍‌.

Check out the documentation to learn more about our supported runtimes.