{
    "require": {
        "mailgun/mailgun-php": "^3.1",
        "php-http/guzzle6-adapter": "^2.0",
        "php-http/message": "^1.9",
        "guzzlehttp/psr7": "^1.7",
        "sunrise/http-factory": "^1.0",
        "kriswallsmith/buzz": "^1.1",
        "nyholm/psr7": "^1.3"
    }
}