diff --git a/src/servala/core/models/service.py b/src/servala/core/models/service.py
index f8c14bb..e17bda2 100644
--- a/src/servala/core/models/service.py
+++ b/src/servala/core/models/service.py
@@ -228,7 +228,7 @@ class ControlPlane(ServalaModelMixin, models.Model):
 
                 for field in ("company_id", "invoice_id"):
                     if value := getattr(organization.billing_entity, f"odoo_{field}"):
-                        labels[f"servala.com/erp_{field}"] = value
+                        labels[f"servala.com/erp_{field}"] = str(value)
 
                 if organization.odoo_sale_order_id:
                     annotations["servala.com/sales_order"] = str(