Concrete – an open source content management system.

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Welcome to the official repository for Concrete CMS development! Concrete CMS is an open source CMS built by people from around the world. Want to get involved? Check out our contributor guide for more info.


If you're looking for Concrete CMS documentation, you'll want to navigate over to If you see anything that needs more information or is just completely wrong, contributions are welcomed! Just log in to the documentation site with your account and edit away!


  1. Clone the repository

     git clone
     cd concretecms/
  2. Use Composer to install the third party dependencies

     composer install

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This repository is for Concrete CMS 9.0 and later. Looking for earlier versions?

(Note: Concrete CMS used to be called concrete5 – which hopefully explains the name of various GitHub repositories and projects.)