Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ^8.1 but your php version (8.0.30) does not satisfy that requirement. Problem 2 - Root composer.json requires phpunit/phpunit ^10.5 -> satisfiable by phpunit/phpunit[10.5.0, ..., 10.5.x-dev]. - phpunit/phpunit[10.5.0, ..., 10.5.x-dev] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement. Problem 3 - roave/infection-static-analysis-plugin[1.34.0, ..., 1.35.x-dev] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires roave/infection-static-analysis-plugin ^1.34 -> satisfiable by roave/infection-static-analysis-plugin[1.34.0, 1.34.x-dev, 1.35.x-dev].