I'd like to use Laravel 5.4 on my production server but the latest PHP 5.6 version available is 5.6.30 (as my local XAMPP installation as well), while the requirements for Laravel 5.4 are php >= 5.6.40 as for <https://packagist.org/packages/laravel/laravel>

Now, I've successfully installed Laravel 5.4 on the server in a subdirectory via SSH and the home page is showing the Laravel logo. Is there some problems I could encounter using this version of PHP down the road? If so, is there any polyfill or adjustment to be made in order to use Laravel 5.4 on PHP 5.6.30 instead of PHP 5.6.40? Thanks