Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires sokeio/admin, it could not be found in any version, there may be a typo in the package name. Problem 2 - Root composer.json requires sokeio/framework dev-main -> satisfiable by sokeio/framework[dev-main]. - sokeio/framework dev-main requires sokeio/laravel ^1.0.1 -> found sokeio/laravel[v1.0.1] but it conflicts with your root composer.json require (dev-main). Problem 3 - Root composer.json requires sokeio/seo dev-main -> satisfiable by sokeio/seo[dev-main]. - sokeio/seo dev-main requires sokeio/laravel ^1.0.0 -> found sokeio/laravel[v1.0.0, v1.0.1] but it conflicts with your root composer.json require (dev-main). Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details. - It's a private package and you forgot to add a custom repository to find it Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.