Set the Python version for your Vercel project

Set the Python version for your Vercel project with pyproject.toml, .python-version, or Pipfile.lock. If you do not set a version, Vercel uses the default Python version.

• A Vercel project that uses the Python runtime
• One of the following files: pyproject.toml, .python-version, or Pipfile.lock

1. Choose a supported version

   Vercel supports the following Python versions:

   • 3.12 (default)
   • 3.13
   • 3.14

2. Add the version to a supported file

   Use one of the following files:

   pyproject.toml

   Add or update requires-python in the [project] section:

   pyproject.toml

   [project]
   requires-python = ">=3.12"

   .python-version

   Create or update a .python-version file:

   .python-version

   3.13

   Pipfile.lock

   If you use Pipenv, update and commit Pipfile.lock.

3. Redeploy your project

   Commit the change and redeploy your project.

Vercel uses Python 3.12 when your repository does not define a supported Python version.

• Using the Python Runtime with Vercel Functions