Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires typhoon/phpstorm-reflection-stubs ^0.4.4 -> satisfiable by typhoon/phpstorm-reflection-stubs[0.4.4]. - typhoon/phpstorm-reflection-stubs 0.4.4 requires typhoon/reflection ^0.4 -> satisfiable by typhoon/reflection[0.4.0, ..., 0.4.x-dev] from composer repo (https://repo.packagist.org) but typhoon/reflection is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.