diff --git a/api/controllers/service_api/dataset/dataset.py b/api/controllers/service_api/dataset/dataset.py
index ee190245d5..394f36c3ff 100644
--- a/api/controllers/service_api/dataset/dataset.py
+++ b/api/controllers/service_api/dataset/dataset.py
@@ -313,7 +313,7 @@ class DatasetApi(DatasetApiResource):
         try:
             if DatasetService.delete_dataset(dataset_id_str, current_user):
                 DatasetPermissionService.clear_partial_member_list(dataset_id_str)
-                return {"result": "success"}, 204
+                return 204
             else:
                 raise NotFound("Dataset not found.")
         except services.errors.dataset.DatasetInUseError:
diff --git a/api/controllers/service_api/dataset/document.py b/api/controllers/service_api/dataset/document.py
index f0f39fc2e5..44c75f40ef 100644
--- a/api/controllers/service_api/dataset/document.py
+++ b/api/controllers/service_api/dataset/document.py
@@ -323,7 +323,7 @@ class DocumentDeleteApi(DatasetApiResource):
         except services.errors.document.DocumentIndexingError:
             raise DocumentIndexingError("Cannot delete document during indexing.")
 
-        return {"result": "success"}, 204
+        return 204
 
 
 class DocumentListApi(DatasetApiResource):
diff --git a/api/controllers/service_api/dataset/segment.py b/api/controllers/service_api/dataset/segment.py
index fb3ca1e15f..ea4be4e511 100644
--- a/api/controllers/service_api/dataset/segment.py
+++ b/api/controllers/service_api/dataset/segment.py
@@ -159,7 +159,7 @@ class DatasetSegmentApi(DatasetApiResource):
         if not segment:
             raise NotFound("Segment not found.")
         SegmentService.delete_segment(segment, document, dataset)
-        return {"result": "success"}, 204
+        return 204
 
     @cloud_edition_billing_resource_check("vector_space", "dataset")
     def post(self, tenant_id, dataset_id, document_id, segment_id):
@@ -344,7 +344,7 @@ class DatasetChildChunkApi(DatasetApiResource):
         except ChildChunkDeleteIndexServiceError as e:
             raise ChildChunkDeleteIndexError(str(e))
 
-        return {"result": "success"}, 204
+        return 204
 
     @cloud_edition_billing_resource_check("vector_space", "dataset")
     @cloud_edition_billing_knowledge_limit_check("add_segment", "dataset")