Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^11.4.3 -> satisfiable by phpunit/phpunit[11.4.3]. - phpunit/phpunit 11.4.3 requires php >=8.2 -> your php version (8.1.30) does not satisfy that requirement. Problem 2 - Root composer.json requires phpspec/prophecy-phpunit ^2.0 -> satisfiable by phpspec/prophecy-phpunit[v2.0.0, ..., v2.3.0]. - phpspec/prophecy-phpunit v2.0.0 requires php ^7.3 -> your php version (8.1.30) does not satisfy that requirement. - phpspec/prophecy-phpunit[v2.0.1, ..., v2.0.2] require phpunit/phpunit ^9.1 -> found phpunit/phpunit[9.1.0, ..., 9.6.21] but it conflicts with your root composer.json require (^11.4.3). - phpspec/prophecy-phpunit v2.1.0 requires phpunit/phpunit ^9.1 || ^10.1 -> found phpunit/phpunit[9.1.0, ..., 9.6.21, 10.1.0, ..., 10.5.38] but it conflicts with your root composer.json require (^11.4.3). - phpspec/prophecy-phpunit[v2.2.0, ..., v2.3.0] require phpunit/phpunit ^9.1 || ^10.1 || ^11.0 -> satisfiable by phpunit/phpunit[11.4.3]. - phpunit/phpunit 11.4.3 requires php >=8.2 -> your php version (8.1.30) does not satisfy that requirement.