diff --git a/weboob/tools/date.py b/weboob/tools/date.py
index ccd3bdfc..83d9dd1f 100644
--- a/weboob/tools/date.py
+++ b/weboob/tools/date.py
@@ -143,7 +143,7 @@ class LinearDateGuesser(object):
     sorted from recent to older.
     """
 
-    def __init__(self, current_date=None, date_max_bump=timedelta(7)):
+    def __init__(self, current_date=None, date_max_bump=timedelta(31)):
         self.date_max_bump = date_max_bump
         if current_date is None:
             current_date = date.today()
@@ -215,7 +215,7 @@ class ChaoticDateGuesser(LinearDateGuesser):
     day and month and the minimum year
     """
 
-    def __init__(self, min_date, current_date=None, date_max_bump=timedelta(7)):
+    def __init__(self, min_date, current_date=None, date_max_bump=timedelta(31)):
         if min_date is None:
             raise ValueError("min_date is not set")
         self.min_date = min_date