diff --git a/src/controllers/04-flow-template-controller.ts b/src/controllers/04-flow-template-controller.ts
index ce7e1b4..8ded548 100644
--- a/src/controllers/04-flow-template-controller.ts
+++ b/src/controllers/04-flow-template-controller.ts
@@ -31,9 +31,9 @@ type WorkflowPayload = {
   step: {
     id?: string;
     name: string;
-    detail?: string;
-    type?: string;
-    value?: string[];
+    detail?: string | null;
+    type?: string | null;
+    value?: string[] | null;
     responsiblePersonId?: string[];
   }[];
   registeredBranchId?: string;