uvReleasedpatch

uv 0.13.4 is out: highlights and upgrade guide

By VersionUpdates Editorial · Published Oct 20, 2026 · 2 min read

At a glance

uv 0.13.4 is a patch release published on Oct 20, 2026. It follows uv 0.13.3 on the same day. It includes 2 listed changes.

Validate PEP 825 variant metadata and treat package versions with invalid metadata as unavailable under wheel-variants
Update the bundled Mozilla root certificates via webpki-root-certs 1.0.10

This is a patch release, normally bug fixes only. It is usually safe to upgrade after your tests pass.

uv self update 0.13.4

Validate PEP 825 variant metadata and treat package versions with invalid metadata as unavailable under wheel-variants (#22512)

Update the bundled Mozilla root certificates via webpki-root-certs 1.0.10 (#22760)

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

You can also download the attestation from GitHub and verify against that directly:

When was uv 0.13.4 released?

uv 0.13.4 was published on Oct 20, 2026.

Is uv 0.13.4 a major update?

No. It is a patch release, mainly bug fixes.

How do I upgrade to uv 0.13.4?

Use the commands in the “How to upgrade” section, then run your test suite.

Where are the official uv 0.13.4 notes?

On the project's official release page: https://github.com/astral-sh/uv/releases/tag/0.13.4