Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=8.2 but your php version (8.1.34) does not satisfy that requirement. Problem 2 - Root composer.json requires mrpunyapal/rector-pest ^0.1 -> satisfiable by mrpunyapal/rector-pest[0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.1.8]. - mrpunyapal/rector-pest[0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.1.8] require php ^8.2 -> your php version (8.1.34) does not satisfy that requirement. Problem 3 - Root composer.json requires peckphp/peck ^0.2 -> satisfiable by peckphp/peck[v0.2.0]. - peckphp/peck v0.2.0 requires php ^8.2 -> your php version (8.1.34) does not satisfy that requirement. Problem 4 - Root composer.json requires phpro/grumphp-shim ^2.18 -> satisfiable by phpro/grumphp-shim[v2.18.0]. - phpro/grumphp-shim v2.18.0 requires php ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0 -> your php version (8.1.34) does not satisfy that requirement.