diff --git a/uncloud_pay/views.py b/uncloud_pay/views.py
index 05a2106..55f1940 100644
--- a/uncloud_pay/views.py
+++ b/uncloud_pay/views.py
@@ -284,7 +284,7 @@ class AdminPaymentViewSet(viewsets.ModelViewSet):
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
 
 # Bills are generated from orders and should not be created or updated by hand.
-class AdminBillViewSet(viewsets.ReadOnlyModelViewSet):
+class AdminBillViewSet(BillViewSet):
     serializer_class = BillSerializer
     permission_classes = [permissions.IsAdminUser]