diff --git a/src/controllers/branch-controller.ts b/src/controllers/branch-controller.ts
index 9aa12a3..5a51f7a 100644
--- a/src/controllers/branch-controller.ts
+++ b/src/controllers/branch-controller.ts
@@ -57,7 +57,7 @@ type BranchUpdate = {
   address?: string;
   zipCode?: string;
   email?: string;
-  telephoneNo: string;
+  telephoneNo?: string;
   contactName?: string;
   contact?: string | string[] | null;
   lineId?: string;