composer.json

{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/morckx/pdf-invoice"
        }
    ],
    "require": {
        "gregwar/captcha": "1.*",
        "monolog/monolog": "3.*",
        "konekt/pdf-invoice": "master-dev"
    }
}