diff --git a/ChangeLog b/ChangeLog
index 44f43536190..24a47982ad0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,9 @@ English Dolibarr ChangeLog
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 ***** ChangeLog for 3.2 compared to 3.1 *****
+WARNING: PHP lower than 5.x are no more supported.
+WARNING: Because of a major datastructure change onto supplier prices tabkes, be aware
+to make a backup of your datbase before making upgrade.
 
 For users:
 - New: Can attach files on social contributions.