Your requirements could not be resolved to an installable set of packages. Problem 1 - php-http/mock-client[1.5.0, ..., 1.6.0] require php-http/client-common ^2.0 -> satisfiable by php-http/client-common[2.0.0, ..., 2.7.0]. - php-http/mock-client 1.4.1 requires php-http/client-common ^1.9 || ^2.0 -> satisfiable by php-http/client-common[1.9.0, 1.9.1, 1.10.0, 1.11.0, 2.0.0, ..., 2.7.0]. - php-http/client-common[1.9.0, ..., 1.11.0] require php ^5.4 || ^7.0 -> your php version (8.3.0) does not satisfy that requirement. - php-http/client-common[2.0.0, ..., 2.2.0] require php ^7.1 -> your php version (8.3.0) does not satisfy that requirement. - php-http/mock-client 1.4.0 require php ^7.1 -> your php version (8.3.0) does not satisfy that requirement. - php-http/client-common[2.2.1, ..., 2.4.0] require symfony/options-resolver ^2.6 || ^3.4.20 || ~4.0.15 || ~4.1.9 || ^4.2.1 || ^5.0 -> found symfony/options-resolver[v2.6.0, ..., v2.8.52, v3.4.20, ..., v3.4.47, v4.0.15, ..., v4.4.44, v5.0.0, ..., v5.4.21] but it conflicts with your root composer.json require (^7.0). - php-http/client-common[2.5.0, ..., 2.7.0] require symfony/options-resolver ~4.0.15 || ~4.1.9 || ^4.2.1 || ^5.0 || ^6.0 -> found symfony/options-resolver[v4.0.15, ..., v4.4.44, v5.0.0, ..., v5.4.21, v6.0.0, ..., v6.4.0] but it conflicts with your root composer.json require (^7.0). - php-http/mock-client[1.3.0, ..., 1.3.1] require php ^5.5 || ^7.0 -> your php version (8.3.0) does not satisfy that requirement. - Root composer.json requires php-http/mock-client ^1.3 -> satisfiable by php-http/mock-client[1.3.0, ..., 1.6.0].