Ошибка при установке языкового пакета через composer require в magento 2

Я опускаюсь ниже во время бега composer require mageplaza/magento-2-dutch-language-pack:*

The requested package mageplaza/magento-2-dutch-language-pack * is satisfiable by mageplaza/magento-2-dutch-language-pack[dev-master] but these conflict with your requirements or minimum-stability.

Композитор.json

{
  "name": "mageplaza/magento-2-dutch-language-pack",
  "description": "Dutch language package for Magento 2",
  "homepage": "https://www.mageplaza.com",
  "require": {
    "php": "~5.5.0|~5.6.0|~7.0.0"
  },
  "type": "magento2-language",
  "version": "1.0.0",
  "license": [
    "MIT"
  ],
  "authors": [
    {
      "name": "Mageplaza team",
      "email": "[email protected]",
      "homepage": "https://www.mageplaza.com",
      "role": "Leader"
    }
  ],
  "autoload": {
    "files": [
      "registration.php"
    ]
  }
}

Может ли кто-нибудь помочь мне в этом.