Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires platine-php/framework ^1.0 -> satisfiable by platine-php/framework[v1.0.0]. - platine-php/framework v1.0.0 requires platine-php/cache 1.0.x-dev -> found platine-php/cache[dev-master, dev-develop] but it does not match the constraint.