Your requirements could not be resolved to an installable set of packages. Problem 1 - larastan/larastan[v2.6.5, ..., 2.x-dev] require illuminate/pipeline ^9.52.16 || ^10.28.0 -> satisfiable by illuminate/pipeline[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - larastan/larastan[v2.6.0, ..., v2.6.4] require illuminate/pipeline ^9.47.0 || ^10.0.0 -> satisfiable by illuminate/pipeline[v9.47.0, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. - Only one of these can be installed: illuminate/pipeline[dev-master, v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev], laravel/framework[dev-master]. laravel/framework replaces illuminate/pipeline and thus cannot coexist with it. - laravel/framework 11.x-dev is an alias of laravel/framework dev-master and thus requires it to be installed too. - Root composer.json requires laravel/framework ^11.0 -> satisfiable by laravel/framework[11.x-dev (alias of dev-master)]. - Root composer.json requires larastan/larastan ^2.6 -> satisfiable by larastan/larastan[v2.6.0, ..., 2.x-dev]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.