diff --git a/docs/USAGE b/docs/USAGE
index 4294435..a80e13f 100644
--- a/docs/USAGE
+++ b/docs/USAGE
@@ -8,6 +8,8 @@ It actually supports some mandatory functionnalities of a framework : routing,
 url beautifier, authentication, outputs multiple formats (like html, csvn, json,
 xml...).
 
+PHP 5.2 minimum
+
 2. Starting a new project
 -------------------------
 To start a new project with this framework, put the domframework dir in a folder