diff --git a/poweremail_signaturit/poweremail_mailbox.py b/poweremail_signaturit/poweremail_mailbox.py
index 2560d04..3df0d9d 100644
--- a/poweremail_signaturit/poweremail_mailbox.py
+++ b/poweremail_signaturit/poweremail_mailbox.py
@@ -66,6 +66,7 @@ def update_poweremail_certificat_state(self, cursor, uid, ids, context=None):
             all_data = tmp_cursor.fetchall()
             pwids = [x[0] for x in all_data]
             self.write(tmp_cursor, uid, pwids, {'certificat_update_datetime': datetime.now().strftime("%Y-%m-%d %H:%M:%S")})
+            tmp_cursor.commit()
         except LockNotAvailable:
             return False
         finally: