Your requirements could not be resolved to an installable set of packages. Problem 1 - larastan/larastan[2.0.0, ..., 2.3.5] require illuminate/database ^9 -> satisfiable by illuminate/database[v9.0.0-beta.1, ..., 9.x-dev]. - Conclusion: don't install illuminate/database v9.34.0 (conflict analysis result) - larastan/larastan[2.4.0, ..., v2.6.4] require illuminate/database ^9.47.0 || ^10.0.0 -> satisfiable by illuminate/database[v9.47.0, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. - Conclusion: don't install illuminate/database v9.48.0 (conflict analysis result) - Conclusion: don't install illuminate/database v9.50.2 (conflict analysis result) - larastan/larastan[v2.6.5, ..., v2.7.0] require illuminate/database ^9.52.16 || ^10.28.0 -> satisfiable by illuminate/database[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - Conclusion: don't install illuminate/database v9.52.16 (conflict analysis result) - Conclusion: don't install illuminate/database v10.38.1 (conflict analysis result) - Conclusion: don't install illuminate/database v10.42.0 (conflict analysis result) - Conclusion: don't install illuminate/database v10.44.0 (conflict analysis result) - laravel/framework[v8.0.0, ..., v8.11.2] require php ^7.3 -> your php version (8.3.3) does not satisfy that requirement. - Only one of these can be installed: laravel/framework[v8.0.0, ..., 8.x-dev], illuminate/database[dev-master, v8.73.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. laravel/framework replaces illuminate/database and thus cannot coexist with it. - illuminate/database 11.x-dev is an alias of illuminate/database dev-master and thus requires it to be installed too. - larastan/larastan[v2.8.0, ..., 2.x-dev] require illuminate/database ^9.52.16 || ^10.28.0 || ^11.0 -> satisfiable by illuminate/database[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev, 11.x-dev (alias of dev-master)]. - Root composer.json requires larastan/larastan ^2.0 -> satisfiable by larastan/larastan[2.0.0, ..., 2.x-dev]. - Root composer.json requires laravel/framework 8.* -> satisfiable by laravel/framework[v8.0.0, ..., 8.x-dev].