Your requirements could not be resolved to an installable set of packages. Problem 1 - barryvdh/laravel-ide-helper[dev-master, 2.13.x-dev] require nikic/php-parser ^4.7 -> found nikic/php-parser[v4.7.0, ..., 4.x-dev] but the package is fixed to v5.0.0 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - barryvdh/laravel-ide-helper 2.13.x-dev is an alias of barryvdh/laravel-ide-helper dev-master and thus requires it to be installed too. - Root composer.json requires barryvdh/laravel-ide-helper * -> satisfiable by barryvdh/laravel-ide-helper[dev-master, 2.13.x-dev (alias of dev-master)]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.