drupal/core/composer.json

{
  "name": "drupal/drupal",
  "description": "Drupal is an open source content management platform powering millions of websites and applications.",
  "license": "GPL-2.0+",
  "require": {
    "symfony/class-loader": "2.1.*",
    "symfony/dependency-injection": "2.1.*",
    "symfony/event-dispatcher": "2.1.*",
    "symfony/http-foundation": "2.1.*",
    "symfony/http-kernel": "2.1.*",
    "symfony/routing": "2.1.*",
    "symfony/yaml": "2.1.*",
    "twig/twig": "1.8.*",
    "doctrine/common": "2.3.*",
    "kriswallsmith/assetic": "1.1.*"
  },
  "minimum-stability": "alpha"
}