composer.json

{
    "require": {
        "behat/behat": "2.4@stable",
        "behat/mink":  "1.4@stable",
        "behat/mink-extension":  "*",
        "behat/mink-selenium2-driver":  "*"
    },

    "config": {
        "bin-dir": "bin/"
    }
}