diff --git a/mondumas/views/utils.py b/mondumas/views/utils.py
index c214136..bae2af1 100644
--- a/mondumas/views/utils.py
+++ b/mondumas/views/utils.py
@@ -37,7 +37,8 @@ def batch_nuit(request):
     TODAY = date.today()
     # purger tous les 1er du mois
     if TODAY.day() == 1 :
-        until_date = date(TODAY.year, TODAY.month, 1).strftime('%Y-%m-%d')
+        # données de + 10 ans
+        until_date = date(TODAY.year - 10, TODAY.month, 1).strftime('%Y-%m-%d')
         purge_mensuelle(request, until_date)
         purge_clients(request)
         delete_orphan_attached_files(request)