Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpspec/prophecy-phpunit ^2.1 -> satisfiable by phpspec/prophecy-phpunit[v2.1.0, ..., 2.x-dev (alias of dev-master)]. - phpspec/prophecy[v1.18.0, ..., v1.19.0] require php ^7.2 || 8.0.* || 8.1.* || 8.2.* || 8.3.* -> your php version (8.5.0-dev) does not satisfy that requirement. - phpspec/prophecy[v1.20.0, ..., v1.21.0] require php ^7.2 || 8.0.* || 8.1.* || 8.2.* || 8.3.* || 8.4.* -> your php version (8.5.0-dev) does not satisfy that requirement. - phpspec/prophecy v1.22.0 requires php ^7.4 || 8.0.* || 8.1.* || 8.2.* || 8.3.* || 8.4.* -> your php version (8.5.0-dev) does not satisfy that requirement. - phpspec/prophecy dev-master requires php 8.2.* || 8.3.* || 8.4.* -> your php version (8.5.0-dev) does not satisfy that requirement. - phpspec/prophecy-phpunit[dev-master, v2.1.0, ..., v2.3.0] require phpspec/prophecy ^1.18 -> satisfiable by phpspec/prophecy[v1.18.0, ..., 1.x-dev (alias of dev-master)]. - phpspec/prophecy 1.x-dev is an alias of phpspec/prophecy dev-master and thus requires it to be installed too. - phpspec/prophecy-phpunit 2.x-dev is an alias of phpspec/prophecy-phpunit dev-master and thus requires it to be installed too.