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Dependency Management for PHP

Composer helps you declare, manage, and install dependencies of PHP projects.

See for more information and documentation.

Continuous Integration

Installation / Usage

Download and install Composer by following the official instructions.

For usage, see the documentation.


Find public packages on

For private package hosting take a look at Private Packagist.


Follow @packagist or @seldaek on Twitter for announcements, or check the #composerphp hashtag.

For support, Stack Overflow offers a good collection of Composer related questions, or you can use the GitHub discussions.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project and its community you agree to abide by those terms.


Latest Composer

PHP 7.2.5 or above for the latest version.

Composer 2.2 LTS (Long Term Support)

PHP versions 5.3.2 - 8.1 are still supported via the LTS releases of Composer (2.2.x). If you run the installer or the self-update command the appropriate Composer version for your PHP should be automatically selected.

Binary dependencies

  • 7z (or 7zz)
  • unzip (if 7z is missing)
  • gzip
  • tar
  • unrar
  • xz
  • Git (git)
  • Mercurial (hg)
  • Fossil (fossil)
  • Perforce (p4)
  • Subversion (svn)

It's important to note that the need for these binary dependencies may vary depending on individual use cases. However, for most users, only 2 dependencies are essential for Composer: 7z (or 7zz or unzip), and git.


See also the list of contributors who participated in this project.

Security Reports

Please send any sensitive issue to Thanks!


Composer is licensed under the MIT License - see the LICENSE file for details.