diff --git a/src/controllers/06-request-list-controller.ts b/src/controllers/06-request-list-controller.ts
index aeae002..dbb6075 100644
--- a/src/controllers/06-request-list-controller.ts
+++ b/src/controllers/06-request-list-controller.ts
@@ -164,7 +164,7 @@ export class RequestListController extends Controller {
     @Query() workStatus?: RequestWorkStatus,
   ) {
     const where = {
-      stepStatus: { some: { workStatus } },
+      stepStatus: workStatus ? { some: { workStatus } } : undefined,
       request: {
         id: requestDataId,
         quotation: {