diff --git a/ecs-20140526/alibabacloud_ecs20140526/models/_describe_instances_request.py b/ecs-20140526/alibabacloud_ecs20140526/models/_describe_instances_request.py
index b6bb94fc6..345f5f226 100644
--- a/ecs-20140526/alibabacloud_ecs20140526/models/_describe_instances_request.py
+++ b/ecs-20140526/alibabacloud_ecs20140526/models/_describe_instances_request.py
@@ -22,7 +22,7 @@ def __init__(
         image_id: str = None,
         inner_ip_addresses: str = None,
         instance_charge_type: str = None,
-        instance_ids: str = None,
+        instance_ids: List[str] = None,
         instance_name: str = None,
         instance_network_type: str = None,
         instance_type: str = None,