Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires kreait/firebase-php ^7.5 -> satisfiable by kreait/firebase-php[7.5.0, ..., 7.x-dev]. - kreait/firebase-php[7.5.0, ..., 7.x-dev] require php ~8.1.0|~8.2.0 -> your php version (8.3.0) does not satisfy that requirement. Problem 2 - Root composer.json requires kreait/laravel-firebase ^5.2 -> satisfiable by kreait/laravel-firebase[5.2.0, 5.3.0, 5.4.0]. - kreait/laravel-firebase[5.2.0, ..., 5.4.0] require php ~8.1.0 || ~8.2.0 -> your php version (8.3.0) does not satisfy that requirement. Problem 3 - roave/better-reflection[5.0.0, ..., 5.10.x-dev] require php ~8.0.12 || ~8.1.0 -> your php version (8.3.0) does not satisfy that requirement. - roave/better-reflection[5.11.0, ..., 5.12.x-dev] require php ~8.0.12 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0) does not satisfy that requirement. - Root composer.json requires roave/better-reflection ^5.0 -> satisfiable by roave/better-reflection[5.0.0, ..., 5.12.x-dev].