diff --git a/intrastat_product/models/account_config_settings.py b/intrastat_product/models/account_config_settings.py
index 7036cf7..acb37ce 100644
--- a/intrastat_product/models/account_config_settings.py
+++ b/intrastat_product/models/account_config_settings.py
@@ -30,4 +30,4 @@ class AccountConfigSettings(models.TransientModel):
     intrastat_accessory_costs = fields.Boolean(
         related='company_id.intrastat_accessory_costs')
     country_id = fields.Many2one(
-        related='company_id.country_id')
+        related='company_id.country_id', readonly=True)