diff --git a/annofabapi/__version__.py b/annofabapi/__version__.py
index ebcbb295..5bbe4824 100644
--- a/annofabapi/__version__.py
+++ b/annofabapi/__version__.py
@@ -1 +1 @@
-__version__ = '0.21.3'
+__version__ = '0.21.4'
diff --git a/annofabapi/wrapper.py b/annofabapi/wrapper.py
index 56c649ac..c7d55078 100644
--- a/annofabapi/wrapper.py
+++ b/annofabapi/wrapper.py
@@ -13,7 +13,7 @@
 from annofabapi import AnnofabApi
 from annofabapi.exceptions import AnnofabApiException
 from annofabapi.models import (AnnotationSpecs, InputData, Inspection, Instruction, JobInfo, JobType, MyOrganization,
-                               OrganizationMember, Project, ProjectMember, SupplementaryData, Task)
+                               OrganizationMember, Project, ProjectMember, SupplementaryData, Task, InspectionStatus)
 
 logger = logging.getLogger(__name__)
 
@@ -348,7 +348,7 @@ def put_supplementary_data_from_file(self, project_id, input_data_id: str, suppl
     #########################################
     def update_status_of_inspections(self, project_id: str, task_id: str, input_data_id: str,
                                      filter_inspection: Callable[[Inspection], bool],
-                                     inspection_status: str) -> List[Inspection]:
+                                     inspection_status: InspectionStatus) -> List[Inspection]:
         """
         検査コメント（返信コメント以外）のstatusを変更する。
 
@@ -375,9 +375,11 @@ def search_updated_inspections(arg_inspection: Inspection) -> bool:
         target_inspections = [e for e in inspections if search_updated_inspections(e)]
 
         for inspection in target_inspections:
-            inspection["status"] = inspection_status
+            inspection["status"] = inspection_status.value
             if inspection["updated_datetime"] is None:
                 inspection["updated_datetime"] = inspection["created_datetime"]
+            else:
+                inspection["updated_datetime"] = annofabapi.utils.str_now()
 
         req_inspection = [{"data": e, "_type": "Put"} for e in target_inspections]
         content = self.api.batch_update_inspections(project_id, task_id, input_data_id, req_inspection)[0]