diff --git a/ssi_account_move_line_day_overdue/data/ir_cron_data.xml b/ssi_account_move_line_day_overdue/data/ir_cron_data.xml
index 128ab6d..de9c57a 100644
--- a/ssi_account_move_line_day_overdue/data/ir_cron_data.xml
+++ b/ssi_account_move_line_day_overdue/data/ir_cron_data.xml
@@ -11,7 +11,7 @@
     <field name="numbercall">-1</field>
     <field eval="False" name="doall" />
     <field name="model_id" ref="account.model_account_move_line" />
-    <field eval="'compute_days_overdue'" name="code" />
+    <field eval="'model.compute_days_overdue()'" name="code" />
     <field name="state">code</field>
 </record>
 
diff --git a/ssi_account_move_line_day_overdue/models/account_move_line.py b/ssi_account_move_line_day_overdue/models/account_move_line.py
index 2e2cd35..615a41a 100644
--- a/ssi_account_move_line_day_overdue/models/account_move_line.py
+++ b/ssi_account_move_line_day_overdue/models/account_move_line.py
@@ -8,8 +8,7 @@
 
 _logger = logging.getLogger(__name__)
 try:
-    import numpy as np
-    import pandas as pd
+    pass
 except (ImportError, IOError) as err:
     _logger.debug(err)
 
@@ -37,10 +36,10 @@ def compute_days_overdue(self):
     def _compute_days_overdue(self):
         self.ensure_one()
         if self.date_maturity:
-            dt_date_due = pd.to_datetime(self.date_maturity)
-            dt_date_today = pd.datetime.now()
+            dt_date_due = fields.Datetime.to_datetime(self.date_maturity)
+            dt_date_today = fields.Datetime.now()
             if dt_date_today <= dt_date_due:
                 day_diff = 0
             else:
-                day_diff = int((dt_date_today - dt_date_due) / np.timedelta64(1, "D"))
+                day_diff = (dt_date_today - dt_date_due).days
             self.write({"days_overdue": day_diff})