Needs only 2.4 now.
diff --git a/Doc/README.txt b/Doc/README.txt
index c719cda..ebeb358 100644
--- a/Doc/README.txt
+++ b/Doc/README.txt
@@ -14,7 +14,7 @@
Building the docs
=================
-You need to install Python 2.5 or higher; the toolset used to build the docs are
+You need to install Python 2.4 or higher; the toolset used to build the docs are
written in Python. The toolset used to build the documentation is called
*Sphinx*, it is not included in this tree, but maintained separately in the
Python Subversion repository. Also needed are Jinja, a templating engine