Upgrade locked dependency versions in a uv project (uv lock --upgrade / --upgrade-package, uv tree, lockfile checks)
domain: docs.astral.sh/uv · 7 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
uv never auto-upgrades locked versions just because newer releases exist — upgrades are explicit.
Upgrade everything: `uv lock --upgrade` (alias -U) re-resolves allowing all packages to move to newer versions (implies --refresh).
Upgrade one package: `uv lock --upgrade-package requests` (alias -P; repeatable, and accepts a target like `--upgrade-package requests==2.32.3`).
Inspect the resolved tree: `uv tree` (locks/updates the lockfile first if needed).
Apply to the environment: `uv sync` (or just `uv run`, which syncs automatically unless --frozen/--no-sync).
In CI, validate without modifying: `uv lock --check` fails if uv.lock is outdated or missing; `uv lock --check-exists` only asserts a lockfile exists.
Docs: https://docs.astral.sh/uv/concepts/projects/sync/ and https://docs.astral.sh/uv/reference/cli/#uv-lock
Known gotchas
Plain `uv lock` only re-locks when pyproject.toml changed — it will not pick up newer releases without --upgrade.
`--locked` (assert lockfile unchanged) vs `--frozen` (use lockfile as-is without checking freshness) mean different things on run/sync commands — CI usually wants --locked.
`--upgrade` implies `--refresh`, so cached index metadata is also revalidated (slower, but correct).
There is no `--upgrade-group` flag on uv lock — upgrade per package or everything.
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