Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/php-code-coverage 11.0.x-dev requires nikic/php-parser ^5.4.0 -> found nikic/php-parser[v5.4.0] but it conflicts with your root composer.json require (^4.17.1). - phpunit/php-code-coverage 11.0.8 requires nikic/php-parser ^5.3.1 -> found nikic/php-parser[v5.3.1, v5.4.0] but it conflicts with your root composer.json require (^4.17.1). - phpunit/phpunit[11.5.5, ..., 11.5.x-dev] require phpunit/php-code-coverage ^11.0.8 -> satisfiable by phpunit/php-code-coverage[11.0.8, 11.0.x-dev]. - Root composer.json requires phpunit/phpunit ^11.5.5 -> satisfiable by phpunit/phpunit[11.5.5, 11.5.x-dev]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.