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Composer 2.0 Compatibility

Upgrading

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Private Packagist Self-Hosted

Private Packagist is fully compatible with both Composer versions 1 and 2, you do not need to make any changes to your Private Packagist configuration when upgrading to Composer 2.0.

In order to upgrade to a current preview release of Composer 2.0 you need to run the following command:

composer.phar self-update --2

If you want to switch back to version 1 you can either use composer self-update --rollback right afterwards or composer self-update --1 at any any later point.

Improvements

Composer 2.0 has significantly improved performance and memory usage. It ships with parallelized downloads of metadata and distribution files and makes use of HTTP/2 features for more efficient server communication.

Private Packagist Composer repositories fully support all new Composer 2 network protocol improvements, including HTTP/2, an improved compression algorithm to reduce the amount of required bandwidth and new API endpoints to provide better error messages.

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