Your requirements could not be resolved to an installable set of packages. Problem 1 - illuminate/validation dev-master requires illuminate/contracts ^11.0 -> found illuminate/contracts[dev-master, 11.x-dev (alias of dev-master)] but it conflicts with your root composer.json require (^8.0|^9.0|^10.0). - Root composer.json requires laravel/framework 8.* -> satisfiable by laravel/framework[v8.0.0, ..., 8.x-dev]. - illuminate/validation[v10.0.0, ..., 10.x-dev] require illuminate/contracts ^10.0 -> satisfiable by illuminate/contracts[v10.0.0, ..., 10.x-dev]. - Conclusion: don't install illuminate/contracts v10.15.0 (conflict analysis result) - illuminate/validation 11.x-dev is an alias of illuminate/validation dev-master and thus requires it to be installed too. - Root composer.json requires livewire/livewire ^3.0@beta -> satisfiable by livewire/livewire[v3.0.0-beta.1]. - livewire/livewire v3.0.0-beta.1 requires illuminate/validation ^9.0|^10.0|^11.0 -> satisfiable by illuminate/validation[v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev, 11.x-dev (alias of dev-master)]. - illuminate/validation[v9.0.0-beta.1, ..., 9.x-dev] require illuminate/contracts ^9.0 -> satisfiable by illuminate/contracts[v9.0.0-beta.1, ..., 9.x-dev]. - Conclusion: don't install illuminate/contracts v9.52.10 (conflict analysis result)