Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel/octane ^2.1 -> satisfiable by laravel/octane[v2.1.0, v2.1.1, 2.x-dev]. - laravel/octane[v2.1.0, ..., 2.x-dev] require nesbot/carbon ^2.66.0 -> found nesbot/carbon[dev-master, 2.66.0, ..., 2.x-dev (alias of dev-master)] but it conflicts with your root composer.json require (2.63).