diff --git a/api/services/workflow_draft_variable_service.py b/api/services/workflow_draft_variable_service.py
index db8c65bac6..f1d3b1109a 100644
--- a/api/services/workflow_draft_variable_service.py
+++ b/api/services/workflow_draft_variable_service.py
@@ -1,4 +1,5 @@
 import dataclasses
+import datetime
 import logging
 from collections.abc import Mapping, Sequence
 from typing import Any, ClassVar
@@ -193,6 +194,7 @@ class WorkflowDraftVariableService:
             variable.set_name(name)
         if value is not None:
             variable.set_value(value)
+        variable.last_edited_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
         self._session.flush()
         return variable