diff --git a/INSTALL b/INSTALL
index 07883acf2f..cd08f29dc9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -4,7 +4,7 @@ Installing trytond_product_cost_fifo
 Prerequisites
 -------------
 
- * Python 2.5 or later (http://www.python.org/)
+ * Python 2.6 or later (http://www.python.org/)
  * trytond (http://www.tryton.org/)
  * trytond_product (http://www.tryton.org/)
  * trytond_stock (http://www.tryton.org/)