NAME
cargo-update — Update dependencies as recorded in the local lock file
SYNOPSIS
cargo update [options] spec
DESCRIPTION
This command will update dependencies in the Cargo.lock file to the latest version. If the Cargo.lock file does not exist, it will be created with the latest available versions.
OPTIONS
Update
Options
spec…
Update only the specified packages. This flag may be specified multiple times. See cargo-pkgid(1) for the SPEC format.
If packages are specified with spec, then a conservative update of the lockfile will be performed. This means that only the dependency specified by SPEC will be updated. Its transitive dependencies will be updated only if SPEC cannot be updated without updating dependencies. All other dependencies will remain locked at their currently recorded versions.
If spec is not specified, all dependencies are updated.
--recursive
When used with spec, dependencies of spec are forced to update as well. Cannot be used with --precise.
--precise precise
When used with spec, allows you to specify a specific version number to set the package to. If the package comes from a git repository, this can be a git revision (such as a SHA hash or tag).
While not recommended, you can specify a yanked version of a package (nightly only). When possible, try other non-yanked SemVer-compatible versions or seek help from the maintainers of the package.
A compatible pre-release version can also be specified even when the version requirement in Cargo.toml doesn’t contain any pre-release identifer (nightly only).
-w, --workspace
Attempt to update only packages defined in the workspace. Other packages are updated only if they don’t already exist in the lockfile. This option is useful for updating Cargo.lock after you’ve changed version numbers in Cargo.toml.
--dry-run
Displays what would be updated, but doesn’t actually write the lockfile.
Display
Options
-v, --verbose
Use verbose output. May be specified twice for “very verbose” output which includes extra output such as dependency warnings and build script output. May also be specified with the term.verbose config value <https://doc.rust-lang.org/cargo/reference/config.html>;.
-q, --quiet
Do not print cargo log messages. May also be specified with the term.quiet config value <https://doc.rust-lang.org/cargo/reference/config.html>;.
--color when
Control when colored output is used. Valid values:
• auto (default): Automatically detect if color support is available on the terminal.
• always: Always display colors.
• never: Never display colors.
May also be specified with the term.color config value <https://doc.rust-lang.org/cargo/reference/config.html>;.
Manifest
Options
--manifest-path path
Path to the Cargo.toml file. By default, Cargo searches for the Cargo.toml file in the current directory or any parent directory.
--ignore-rust-version
Ignore rust-version specification in packages.
--locked
Asserts that the exact same dependencies and versions are used as when the existing Cargo.lock file was originally generated. Cargo will exit with an error when either of the following scenarios arises:
• The lock file is missing.
• Cargo attempted to change the lock file due to a different dependency resolution.
It may be used in environments where deterministic builds are desired, such as in CI pipelines.
--offline
Prevents Cargo from accessing the network for any reason. Without this flag, Cargo will stop with an error if it needs to access the network and the network is not available. With this flag, Cargo will attempt to proceed without the network if possible.
Beware that this may result in different dependency resolution than online mode. Cargo will restrict itself to crates that are downloaded locally, even if there might be a newer version as indicated in the local copy of the index. See the cargo-fetch(1) command to download dependencies before going offline.
May also be specified with the net.offline config value <https://doc.rust-lang.org/cargo/reference/config.html>;.
--frozen
Equivalent to specifying both --locked and --offline.
Common
Options
+toolchain
If Cargo has been installed with rustup, and the first argument to cargo begins with +, it will be interpreted as a rustup toolchain name (such as +stable or +nightly). See the rustup documentation <https://rust-lang.github.io/rustup/overrides.html>; for more information about how toolchain overrides work.
--config KEY=VALUE or PATH
Overrides a Cargo configuration value. The argument should be in TOML syntax of KEY=VALUE, or provided as a path to an extra configuration file. This flag may be specified multiple times. See the command-line overrides section <https://doc.rust-lang.org/cargo/reference/config.html#command-line-overrides>; for more information.
-C PATH
Changes the current working directory before executing any specified operations. This affects things like where cargo looks by default for the project manifest (Cargo.toml), as well as the directories searched for discovering .cargo/config.toml, for example. This option must appear before the command name, for example cargo -C path/to/my-project build.
This option is only available on the nightly channel <https://doc.rust-lang.org/book/appendix-07-nightly-rust.html>; and requires the -Z unstable-options flag to enable (see #10098 <https://github.com/rust-lang/cargo/issues/10098>;).
-h, --help
Prints help information.
-Z flag
Unstable (nightly-only) flags to Cargo. Run cargo -Z help for details.
ENVIRONMENT
See the reference <https://doc.rust-lang.org/cargo/reference/environment-variables.html>; for details on environment variables that Cargo reads.
EXIT STATUS
• 0: Cargo succeeded.
• 101: Cargo failed to complete.
EXAMPLES
1. Update all dependencies in the lockfile:
cargo update
2. Update only specific dependencies:
cargo update foo bar
3. Set a specific dependency to a specific version:
cargo update foo --precise 1.2.3