diff --git a/wizard/res_partner_contract_wizard.py b/wizard/res_partner_contract_wizard.py
index 888d139..dcd6b5b 100644
--- a/wizard/res_partner_contract_wizard.py
+++ b/wizard/res_partner_contract_wizard.py
@@ -37,6 +37,7 @@ class ContractWizard(models.TransientModel):
             ("res.partner.contract.annex", "Contract Annex"),
         ],
         string="Target",
+        readonly=True,
     )
     company_id = fields.Many2one("res.partner", string="Company")
     partner_id = fields.Many2one("res.partner", string="Partner")