diff --git a/src/entities/DevelopmentScholarship.ts b/src/entities/DevelopmentScholarship.ts
index 1c25403..847ce4d 100644
--- a/src/entities/DevelopmentScholarship.ts
+++ b/src/entities/DevelopmentScholarship.ts
@@ -436,7 +436,7 @@ export class CreateDevelopmentScholarship {
   bookNo: string | null;
   bookNoDate: Date | null;
   bookApproveDate: Date | null;
-  useOfficialTime: boolean | null;
+  useOfficialTime: boolean | false;
   changeDetail: string | null;
   scholarshipType: string | null;
   fundType: string | null;
@@ -488,7 +488,7 @@ export class UpdateDevelopmentScholarship {
   bookNo: string | null;
   bookNoDate: Date | null;
   bookApproveDate: Date | null;
-  useOfficialTime: boolean | null;
+  useOfficialTime: boolean | false;
   changeDetail: string | null;
   scholarshipType: string | null;
   fundType: string | null;