diff --git a/src/controllers/03-employee-passport-controller.ts b/src/controllers/03-employee-passport-controller.ts
index 12e0b01..6af121c 100644
--- a/src/controllers/03-employee-passport-controller.ts
+++ b/src/controllers/03-employee-passport-controller.ts
@@ -43,7 +43,7 @@ type EmployeePassportPayload = {
 
   workerStatus: string;
   nationality: string;
-  otherNationality?: string;
+  otherNationality?: string | null;
   namePrefix?: string | null;
   firstName: string;
   firstNameEN: string;