Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ~11.3.0 -> satisfiable by phpunit/phpunit[11.3.0, 11.3.x-dev]. - phpunit/phpunit[11.3.0, ..., 11.3.x-dev] require php >=8.2 -> your php version (7.4.6; overridden via config.platform, actual: 7.3.33) does not satisfy that requirement. Problem 2 - nette/utils dev-master requires php 8.0 - 8.4 -> your php version (7.4.6; overridden via config.platform, actual: 7.3.33) does not satisfy that requirement. - nette/utils v4.0.0 requires php >=8.0 <8.3 -> your php version (7.4.6; overridden via config.platform, actual: 7.3.33) does not satisfy that requirement. - nette/utils[v4.0.1, ..., v4.0.4] require php >=8.0 <8.4 -> your php version (7.4.6; overridden via config.platform, actual: 7.3.33) does not satisfy that requirement. - nette/utils 4.0.x-dev is an alias of nette/utils dev-master and thus requires it to be installed too. - Root composer.json requires nette/utils ^4.0.0 -> satisfiable by nette/utils[v4.0.0, ..., 4.0.x-dev (alias of dev-master)].