diff --git a/core/graphene/mutations.py b/core/graphene/mutations.py
index 72486f56..385dc4d0 100644
--- a/core/graphene/mutations.py
+++ b/core/graphene/mutations.py
@@ -175,13 +175,13 @@ class BuyOrder(BaseMutation):
         description = _("buy an order")
 
     class Arguments:
-        order_uuid = UUID(required=False)
+        order_uuid = String(required=False)
         order_hr_id = String(required=False)
         force_balance = Boolean(required=False)
         force_payment = Boolean(required=False)
-        promocode_uuid = UUID(required=False)
-        shipping_address = UUID(required=False)
-        billing_address = UUID(required=False)
+        promocode_uuid = String(required=False)
+        shipping_address = String(required=False)
+        billing_address = String(required=False)
 
     order = Field(OrderType, required=False)
     transaction = Field(TransactionType, required=False)
diff --git a/core/models.py b/core/models.py
index bfb2d6ce..b09b4eaf 100644
--- a/core/models.py
+++ b/core/models.py
@@ -1566,7 +1566,7 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
         promocode_uuid: str | None = None,
         billing_address: str | None = None,
         shipping_address: str | None = None,
-        chosen_products: list = None,
+        chosen_products: list | None = None,
     ) -> Self | Transaction | None:
         order = self
         if chosen_products: