Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires moneyphp/crypto-currencies ^1.0.0 -> satisfiable by moneyphp/crypto-currencies[1.0.0-beta1, 1.0.0]. - moneyphp/crypto-currencies[1.0.0-beta1, ..., 1.0.0] require php ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0-dev) does not satisfy that requirement. Problem 2 - Root composer.json requires vimeo/psalm ~5.3.0 -> satisfiable by vimeo/psalm[5.3.0]. - vimeo/psalm 5.3.0 requires php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0-dev) does not satisfy that requirement. Problem 3 - phpspec/phpspec[7.3.0, ..., 7.4.x-dev] require php ^7.3 || 8.0.* || 8.1.* || 8.2.* -> your php version (8.3.0-dev) does not satisfy that requirement. - Root composer.json requires phpspec/phpspec ^7.3 -> satisfiable by phpspec/phpspec[7.3.0, 7.4.0, 7.4.x-dev].