Hello, I'm using ISPConfig version 18.104.22.168 on a debian 6, with php 5.3 Can i update my php version to 5.4? or even 5.5 or 5.6 without a risk for ispconfig? My websites are using some CMS like joomla and prestashop, and i need to upate my php version for the latest version of joomla, and soon prestashop too. If there is no apparent risk to upgrade php, does someone knows the commande line ? Many thanks.