Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/serializer ^7.0 -> satisfiable by symfony/serializer[v7.0.0, v7.0.1, v7.0.2]. - symfony/serializer[v7.0.0, ..., v7.0.2] require php >=8.2 -> your php version (8.1.27) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/yaml ^7.0 -> satisfiable by symfony/yaml[v7.0.0]. - symfony/yaml v7.0.0 requires php >=8.2 -> your php version (8.1.27) does not satisfy that requirement. Problem 3 - jane-php/jane-php dev-main requires php ^8.2 -> your php version (8.1.27) does not satisfy that requirement. - Root composer.json requires jane-php/jane-php @dev -> satisfiable by jane-php/jane-php[dev-main].