Update-time - it's time to update your dependencies

Keeping dependencies up-to-date is an important aspect of software maintenance. Update-time is a command line tool that scans your repository for dependencies and updates them to their latest versions. It looks at the files you already have — pyproject.toml, hand-written requirements.txt files, package.json, Dockerfiles, GitHub Actions workflows, CircleCI configs, GitLab CI configs, Docker Compose and Helm manifests, and jsDelivr URLs — and rewrites the pinned versions in place. To avoid adopting freshly published releases that may still be buggy, it applies a cooldown period (see Cooldown below).

Usage

Run Update-time without installing it using uvx:

uvx update-time

Or install it as a uv tool so it's always available on your PATH:

uv tool install update-time
update-time

Update-time has a small command-line interface. Run update-time -h/--help to see all options, update-time -V/--version to print the version, and update-time --cooldown DAYS to override the default cooldown period (see Cooldown below). Running update-time with no options in the root folder of a repository updates all supported dependencies.

The recommended workflow is to run Update-time on a dedicated branch, push it, and let CI do the verification:

1. Create a branch for the updates.
2. Run update-time in the root of your repository to update the dependencies in place.
3. Commit the changes and open a pull request.
4. Let your tests and checks run in CI to confirm nothing is broken before merging.

To raise API rate limits while updating, set the following environment variables before running Update-time:

• GITHUB_TOKEN — increases the GitHub API rate limit when updating GitHub Actions. The token only needs to read public release and commit data, so no specific scope is required: both a classic token with no scopes selected and a fine-grained token with default read-only access to public repositories work.
• DOCKER_HUB_USERNAME and DOCKER_HUB_TOKEN — authenticate to the Docker Hub API (both must be set) to increase its rate limit when updating Docker images.

What is updated

Update-time runs a set of updater scripts, each responsible for one kind of dependency. The file-rewriting scripts run concurrently where it's safe to do so; package.json engine and dependency updates run sequentially because they touch the same files.

Only versions specified with an exact match (== for Python, a concrete tag — optionally already pinned as tag@sha256:digest — for images) are updated; looser version specifiers are left untouched, so you can pin a maximum version to opt a dependency out of automatic updates. Where available, Update-time prints the changelog entries between the current and new version so you can review what changed.

In requirements.txt files only exact == pins are updated. The following are left untouched:

• Git, VCS, and URL dependencies (e.g. git+https://github.com/org/repo.git@v8.0.3.0, direct URLs, and -e/editable installs) — these are not registry versions, so Update-time does not bump their refs; update them manually.
• Compiled or hash-pinned files — a requirements.txt generated by pip-tools or uv pip compile (recognised by an autogenerated header, a sibling .in file, or --hash= lines) is skipped entirely, because bumping a single pin without recompiling its transitive dependencies and hashes would corrupt the file. Regenerate these with your compiler instead.

References that are not yet pinned are pinned automatically:

• Docker images referenced by tag only — base images in Dockerfiles (FROM image:tag), CircleCI images, GitLab CI images, and Docker Compose / Helm manifest images — get the @sha256:digest of the (latest) tag appended, so the image is reproducible. Images without a concrete version tag are ignored: references through a template ({{ ... }}) or variable substitution (${VAR}), and tagless base images such as FROM scratch or stage references.
• GitHub Actions referenced by version tag only (e.g. uses: actions/checkout@v4) are pinned to the commit SHA of the latest version, with the version added as a trailing comment (e.g. uses: actions/checkout@<sha> # v4.1.1). Actions referenced by a branch (e.g. @main) are left untouched because they don't resolve to a version.

Cooldown

To avoid adopting releases that are too fresh to trust, Update-time honours a cooldown period during which newly published versions are not yet picked up. Where the cooldown comes from depends on the dependency type:

• Docker images, GitHub Actions, and requirements.txt dependencies — Update-time enforces its own cooldown, based on each image tag's push date and each release's publication date. It defaults to 7 days and can be changed with the --cooldown option, for example update-time --cooldown 14.
• pyproject.toml dependencies — Update-time delegates the actual updating to uv, so the cooldown is whatever you configure for uv. Use the exclude-newer setting under [tool.uv] in your pyproject.toml to hold back recently released versions.
• npm dependencies — Update-time delegates the actual updating to npm, so the cooldown is whatever you configure for npm (for example via your .npmrc).

Because pyproject.toml and npm updates are delegated, the built-in 7-day cooldown does not apply to them; configure those tools directly if you want a cooldown there. (Hand-written requirements.txt dependencies are updated directly against PyPI, so they do use Update-time's built-in cooldown.)

Point of contact

Point of contact for this repository is Frank Niessink.