Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires tastyigniter/core ^v4.0@beta || ^v4.0@dev -> satisfiable by tastyigniter/core[v4.0.0-beta.1, v4.0.0, 4.0.x-dev (alias of dev-master)]. - tastyigniter/core dev-master requires tastyigniter/ti-ext-api ^4.0 -> satisfiable by tastyigniter/ti-ext-api[v4.0.0-beta.1, v4.x-dev] from composer repo (https://repo.packagist.org) but tastyigniter/ti-ext-api dev-master is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. - tastyigniter/core 4.0.x-dev is an alias of tastyigniter/core dev-master and thus requires it to be installed too.