diff --git a/core/models.py b/core/models.py
index eb05e54a..6227b25d 100644
--- a/core/models.py
+++ b/core/models.py
@@ -9,6 +9,7 @@ from django.contrib.postgres.indexes import GinIndex
 from django.core.cache import cache
 from django.core.exceptions import BadRequest, ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator
+from django.db import transaction
 from django.db.models import (
     CASCADE,
     PROTECT,
@@ -1617,11 +1618,12 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
             case "balance":
                 if order.user.payments_balance.amount < amount:
                     raise NotEnoughMoneyError(_("insufficient funds to complete the order"))
-                order.status = "CREATED"
-                order.buy_time = timezone.now()
-                order.order_products.all().update(status="DELIVERING")
-                order.save()
-                return order
+                with transaction.atomic():
+                    order.status = "CREATED"
+                    order.buy_time = timezone.now()
+                    order.update_order_products_statuses("DELIVERING")
+                    order.save()
+                    return order
             case "payment":
                 order.status = "PAYMENT"
                 order.save()
@@ -1708,6 +1710,9 @@ class Order(ExportModelOperationsMixin("order"), NiceModel):  # type: ignore [mi
             self.status = "FINISHED"
             self.save()
 
+    def update_order_products_statuses(self, status: str = "PENDING"):
+        self.order_products.update(status=status)
+
     def bulk_add_products(self, products: list[dict[str, Any]]):
         for product in products:
             self.add_product(