diff --git a/api/models/workflow.py b/api/models/workflow.py
index 0a9982ed09..a3855b20bf 100644
--- a/api/models/workflow.py
+++ b/api/models/workflow.py
@@ -366,11 +366,11 @@ class Workflow(Base):
             self._rag_pipeline_variables = "{}"
 
         variables_dict: dict[str, Any] = json.loads(self._rag_pipeline_variables)
-        results = [v for v in variables_dict.values()]
+        results = list(variables_dict.values())
         return results
 
     @rag_pipeline_variables.setter
-    def rag_pipeline_variables(self, values: List[dict]) -> None:
+    def rag_pipeline_variables(self, values: list[dict]) -> None:
         self._rag_pipeline_variables = json.dumps(
             {item["variable"]: item for item in values},
             ensure_ascii=False,