diff --git a/src/pages/01_branch-management/MainPage.vue b/src/pages/01_branch-management/MainPage.vue
index 8afdbdb6..69a9c4e1 100644
--- a/src/pages/01_branch-management/MainPage.vue
+++ b/src/pages/01_branch-management/MainPage.vue
@@ -333,8 +333,8 @@ const defaultFormData = {
   webUrl: '',
   virtual: false,
   selectedImage: '',
-  permitExpireDate: new Date(),
-  permitIssueDate: new Date(),
+  permitExpireDate: null,
+  permitIssueDate: null,
   permitNo: '',
 };
 
diff --git a/src/stores/branch/types.ts b/src/stores/branch/types.ts
index 93cf82a2..099991f0 100644
--- a/src/stores/branch/types.ts
+++ b/src/stores/branch/types.ts
@@ -67,8 +67,8 @@ export type Branch = {
 export type BranchWithChildren = Branch & { branch: Branch[] };
 
 export type BranchCreate = {
-  permitExpireDate: Date;
-  permitIssueDate: Date;
+  permitExpireDate: Date | null;
+  permitIssueDate: Date | null;
   permitNo: string;
   selectedImage?: string;
   code?: string;