diff --git a/myproject/orders/services/draft_service.py b/myproject/orders/services/draft_service.py
index 5eb8088..e7ebd69 100644
--- a/myproject/orders/services/draft_service.py
+++ b/myproject/orders/services/draft_service.py
@@ -6,6 +6,7 @@ from django.db import transaction
 from django.utils import timezone
 from django.core.exceptions import ValidationError
 from decimal import Decimal
+import decimal
 
 from ..models import Order, OrderItem
 from products.models import Product, ProductKit
@@ -114,7 +115,19 @@ class DraftOrderService:
             # Обрабатываем простые поля
             for field in simple_fields:
                 if field in data:
-                    setattr(order, field, data[field])
+                    value = data[field]
+
+                    # Конвертируем числовые поля в Decimal
+                    if field in ['delivery_cost', 'discount_amount']:
+                        if value == '' or value is None:
+                            value = None
+                        else:
+                            try:
+                                value = Decimal(str(value))
+                            except (ValueError, TypeError, decimal.InvalidOperation):
+                                value = Decimal('0')
+
+                    setattr(order, field, value)
 
             order.modified_by = user
             order.last_autosave_at = timezone.now()