# Requirements and compatibility
In order to work, XTDir for SobiPro (opens new window) requires the following server software environment:
- Joomla! 3+, or superior. Please, download the latest version at Joomla! (opens new window).
- PHP 5.3.10 +, or superior - General-purpose server-side scripting language for web development and a popular open-source database system..
- SobiPro 1.3+, or superior
- MySQL 5.5+, or superior (recommended).
- PHP memory_limit 64 M, or more (recommended).
XTDir keeps backwards compatibility with previous SobiPro versions. Please, remember to verify SobiPro requirements here: https://www.sigsiu.net/center/sobipro-component/98-requirements (opens new window).
From Sigsiu's Archive (opens new window): Please note: NO SUPPORT is given for older versions of SobiPro: SobiPro 1.2, 1.1 and 1.0.