UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support PHP Version Requirements

The website that my forum is associated with uses Joomla. I upgraded to 3.7 and it is telling me "Error - We have detected that your server is using PHP 5.4.38 which is obsolete and no longer receives official security updates by its developers. The Joomla! Project recommends [u]upgrading your site to PHP 5.6 or later which will receive security updates at least until 2018-12-31."[/u] Even with that error, it works fine.

What versions of PHP are acceptable to UBB?

I'm not sure if I can do that or if I need the web-host to do it, but I'd like this information before doing that.

Thanks!