Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel-doctrine/extensions 2.0.x-dev -> satisfiable by laravel-doctrine/extensions[2.0.x-dev]. - laravel-doctrine/extensions 2.0.x-dev requires laravel-doctrine/orm ^3.0 -> satisfiable by laravel-doctrine/orm[3.0.0RC1, ..., 3.0.x-dev] from composer repo (https://repo.packagist.org) but laravel-doctrine/orm is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.