Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel/framework 7.* -> satisfiable by laravel/framework[v7.0.0, ..., 7.x-dev]. - illuminate/support[v10.33.0, ..., 10.x-dev] require php ^8.1 -> your php version (8.0.30) does not satisfy that requirement. - larastan/larastan 2.x-dev requires illuminate/support ^9.52.16 || ^10.28.0 || ^11.0 -> satisfiable by illuminate/support[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - larastan/larastan v2.7.0 requires illuminate/support ^9.52.16 || ^10.28.0 -> satisfiable by illuminate/support[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - Conclusion: don't install illuminate/support v9.52.16 (conflict analysis result) - Root composer.json requires larastan/larastan ^2.7.0 -> satisfiable by larastan/larastan[v2.7.0, 2.x-dev].