Nonstick Pancake Maker

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    4.0.0 • Public • Published

    npm Build Status

    v3 released! See the release notes for a description of breaking changes.

    npm-check-updates upgrades your package.json dependencies to the latest versions, ignoring specified versions.

    npm-check-updates maintains your existing semantic versioning policies, i.e., it will upgrade "express": "^4.0.0" to "express": "^5.0.0".

    npm-check-updates only modifies your package.json file. Run npm install to update your installed packages and package-lock.json.


    • Red = major upgrade (and all major version zero)
    • Cyan = minor upgrade
    • Green = patch upgrade

    You may also want to consider npm-check. Similar purpose, different features.


    npm install -g npm-check-updates


    Show any new dependencies for the project in the current directory:

    $ ncu
    Checking package.json
    [====================] 5/5 100%
     express           4.12.x  →   4.13.x
     multer            ^0.1.8  →   ^1.0.1
     react-bootstrap  ^0.22.6  →  ^0.24.0
     react-a11y        ^0.1.1  →   ^0.2.6
     webpack          ~1.9.10  →  ~1.10.5
    Run ncu -u to upgrade package.json

    Upgrade a project's package file:

    Make sure your package file is in version control and all changes have been committed. This will overwrite your package file.

    $ ncu -u
    Upgrading package.json
    [====================] 1/1 100%
     express           4.12.x  →   4.13.x
    Run npm install to install new versions.
    $ npm install      # update installed packages and package-lock.json 

    Check global packages:

    $ ncu -g           # add -u to get a one-line command for upgrading 

    You can include or exclude specific packages using the --filter and --reject options. They accept strings, comma-or-space-delimited lists, or regular expressions:

    # match mocha and should packages exactly 
    $ ncu mocha             # shorthand for ncu -f mocha (or --filter) 
    $ ncu one, two, three
    # exclude packages 
    $ ncu -x nodemon        # shorthand for ncu --reject nodemon 
    # match packages that start with "gulp-" using regex 
    $ ncu "/^gulp-.*$/"
    # match packages that do not start with "gulp-". 
    $ ncu '/^(?!gulp-).*$/' # mac/linux 
    $ ncu "/^(?!gulp-).*$/" # windows 


    --configFilePath         rc config file path (default: directory of `packageFile` or ./ otherwise)
    --configFileName         rc config file name (default: .ncurc.{json,yml,js})                             
    --cwd                    Used as current working directory for `spawn` in npm listing
    --dep                    check only a specific section(s) of dependencies:
                             prod|dev|peer|optional|bundle (comma-delimited)
    --engines-node           include only packages that satisfy engines.node as
                             specified in the package file
    -e, --error-level        set the error-level. 1: exits with error code 0 if no
                             errors occur. 2: exits with error code 0 if no
                             packages need updating (useful for continuous
    -f, --filter             include only package names matching the given string,
                             comma-or-space-delimited list, or /regex/
    -g, --global             check global packages instead of in the current project
    -i, --interactive        Enable interactive prompts for each dependency;
                             Implies -u unless one of the json options are set
    -j, --jsonAll            output new package file instead of human-readable
    --jsonDeps               Will return output like `jsonAll` but only lists
                             `dependencies`, `devDependencies`, and
                             `optionalDependencies` of the new package data.
    --jsonUpgraded           output upgraded dependencies in json
    -l, --loglevel           what level of logs to report: silent, error, warn,
                             info, verbose, silly (default: warn)
    -m, --minimal            do not upgrade to newer versions that are already
                             satisfied by the existing version range (v2 behavior).
    -n, --newest             find the newest published versions available instead
                             of the latest stable versions
    -p, --packageManager     npm or bower (default: npm)
    --packageData            include stringified package file (use stdin instead)
    --packageFile            package file location (default: ./package.json)
    --pre                    include -alpha, -beta, -rc. Default: 0. Default
                             with --newest and --greatest: 1.
    --prefix                 Used as current working directory in bower and npm
    -r, --registry           specify third-party NPM registry
    --removeRange            remove version ranges from the final package version
    -s, --silent             don't output anything (--loglevel silent)
    --semverLevel            find the highest version within "major" or "minor"
    -t, --greatest           find the highest versions available instead of the
                             latest stable versions
    --timeout                a global timeout in ms
    -u, --upgrade            overwrite package file
    -v, --version            get version
    -V                       get version
    -x, --reject             exclude packages matching the given string, comma-
                             delimited list, or regex

    How dependency updates are determined

    • Direct dependencies will be increased to the latest stable version:
      • 1.21.3
      • with --semverLevel major
      • with --semverLevel minor
    • Semantic versioning policies for levels are maintained while satisfying the latest version:
    • ^1.2.0^2.0.0
    • 1.x2.x
    • "Any version" is maintained:
      • **
    • "Greater than" is maintained:
      • >0.2.0>0.3.0
    • Closed ranges are replaced with a wildcard:
      • 1.0.0 < 2.0.0^3.0.0

    Configuration Files

    Use a .ncurc.{json,yml,js} file to specify configuration information. You can specify file name and path using --configFileName and --configFilePath command line options.

    For example, .ncurc.json:

      "upgrade": true,
      "filter": "express",
      "reject": [

    Module Use

    npm-check-updates can be required:

    const ncu = require('npm-check-updates');
        // Any command-line option can be specified here.
        // These are set by default:
        jsonUpgraded: true,
        packageManager: 'npm',
        silent: true
    }).then((upgraded) => {
        console.log('dependencies to upgrade:', upgraded);

    Known Issues

    • Windows: If npm-check-updates hangs, run ncu --loglevel verbose to see if it is waiting for stdin. If so, try setting the package file explicitly: ncu -g --packageFile package.json. See #136.

    Also search the issues page.


    Please file an issue! But always search existing issues first!


    npm i npm-check-updates@4.0.0





    Unpacked Size

    73.4 kB

    Total Files


    Last publish


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