- https://blog.packagist.com/composer-2-0-is-now-available/ - https://chromatichq.com/blog/preventing-conflicts-when-upgrading-composer-2 - https://www.drupal.org/node/3174472 [Twitter](https://twitter.com/shaal/status/1320218135404957696): ``` After upgrading to Composer 2, this command helped me keeping Drupal 8 projects compatible - composer require "composer/installers:^1.9" "cweagans/composer-patches:^1.7" "drupal/core-composer-scaffold:^8.9" "zaporylie/composer-drupal-optimizations:^1.2" ```