diff --git a/surveillance/maintenance.sql b/surveillance/maintenance.sql
index bf6fe199..0c27bd2a 100644
--- a/surveillance/maintenance.sql
+++ b/surveillance/maintenance.sql
@@ -3,10 +3,10 @@
 -----------------------------------------------------------------
 
 -- effacement des vieux enregistrements
-DELETE FROM upload where date< timestamp 'now' - interval '5 days';
-DELETE FROM virus where date< timestamp 'now' - interval '5 days';
-DELETE FROM flood where date< timestamp 'now' - interval '5 days';
-DELETE FROM p2p where date< timestamp 'now' - interval '5 days';
+DELETE FROM upload where date< timestamp 'now' - interval '4 days';
+DELETE FROM virus where date< timestamp 'now' - interval '4 days';
+DELETE FROM flood where date< timestamp 'now' - interval '4 days';
+DELETE FROM p2p where date< timestamp 'now' - interval '4 days';
 
 -- suppression complète des entrées
 VACUUM;