diff --git a/backend/app/Http/Controllers/Admin/System/DepartmentController.php b/backend/app/Http/Controllers/Admin/System/DepartmentController.php
index 003db50..c357009 100644
--- a/backend/app/Http/Controllers/Admin/System/DepartmentController.php
+++ b/backend/app/Http/Controllers/Admin/System/DepartmentController.php
@@ -22,9 +22,9 @@ class DepartmentController extends Controller
     public function store(Request $request): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'required|string|max:50',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
@@ -36,9 +36,9 @@ class DepartmentController extends Controller
     public function update(Request $request, Department $department): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'string|max:50',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
diff --git a/backend/app/Http/Controllers/Admin/System/DictionaryController.php b/backend/app/Http/Controllers/Admin/System/DictionaryController.php
index 7ca3e96..e28f416 100644
--- a/backend/app/Http/Controllers/Admin/System/DictionaryController.php
+++ b/backend/app/Http/Controllers/Admin/System/DictionaryController.php
@@ -44,7 +44,7 @@ class DictionaryController extends Controller
         $data = $request->validate([
             'label' => 'required|string|max:100',
             'value' => 'required|string|max:100',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
@@ -61,7 +61,7 @@ class DictionaryController extends Controller
         $data = $request->validate([
             'label' => 'string|max:100',
             'value' => 'string|max:100',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
diff --git a/backend/app/Http/Controllers/Admin/System/MenuController.php b/backend/app/Http/Controllers/Admin/System/MenuController.php
index c5e3d08..9236f5e 100644
--- a/backend/app/Http/Controllers/Admin/System/MenuController.php
+++ b/backend/app/Http/Controllers/Admin/System/MenuController.php
@@ -20,7 +20,7 @@ class MenuController extends Controller
     public function store(Request $request): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'required|string|max:50',
             'path' => 'nullable|string|max:255',
             'component' => 'nullable|string|max:255',
@@ -28,7 +28,7 @@ class MenuController extends Controller
             'permission_code' => 'nullable|string|max:100',
             'type' => 'required|in:1,2,3',
             'visible' => 'in:0,1',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
@@ -39,7 +39,7 @@ class MenuController extends Controller
     public function update(Request $request, Menu $menu): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'string|max:50',
             'path' => 'nullable|string|max:255',
             'component' => 'nullable|string|max:255',
@@ -47,7 +47,7 @@ class MenuController extends Controller
             'permission_code' => 'nullable|string|max:100',
             'type' => 'in:1,2,3',
             'visible' => 'in:0,1',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
             'status' => 'in:0,1',
         ]);
 
diff --git a/backend/app/Http/Controllers/Admin/System/PermissionController.php b/backend/app/Http/Controllers/Admin/System/PermissionController.php
index 61d7e21..4630a65 100644
--- a/backend/app/Http/Controllers/Admin/System/PermissionController.php
+++ b/backend/app/Http/Controllers/Admin/System/PermissionController.php
@@ -20,13 +20,13 @@ class PermissionController extends Controller
     public function store(Request $request): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'required|string|max:50',
             'code' => 'required|string|max:100|unique:permissions,code',
             'module' => 'nullable|string|max:50',
             'type' => 'required|in:1,2,3',
             'description' => 'nullable|string|max:255',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
         ]);
 
         $permission = Permission::create($data);
@@ -36,13 +36,13 @@ class PermissionController extends Controller
     public function update(Request $request, Permission $permission): JsonResponse
     {
         $data = $request->validate([
-            'parent_id' => 'integer',
+            'parent_id' => 'nullable|integer',
             'name' => 'string|max:50',
             'code' => 'string|max:100|unique:permissions,code,' . $permission->id,
             'module' => 'nullable|string|max:50',
             'type' => 'in:1,2,3',
             'description' => 'nullable|string|max:255',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
         ]);
 
         $permission->update($data);
diff --git a/backend/app/Http/Controllers/Admin/System/PositionController.php b/backend/app/Http/Controllers/Admin/System/PositionController.php
index 98285d3..7004a27 100644
--- a/backend/app/Http/Controllers/Admin/System/PositionController.php
+++ b/backend/app/Http/Controllers/Admin/System/PositionController.php
@@ -21,7 +21,7 @@ class PositionController extends Controller
     {
         $data = $request->validate([
             'name' => 'required|string|max:50',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
         ]);
 
         $data['store_id'] = auth()->user()->store_id;
@@ -33,7 +33,7 @@ class PositionController extends Controller
     {
         $data = $request->validate([
             'name' => 'string|max:50',
-            'sort' => 'integer',
+            'sort' => 'nullable|integer',
         ]);
 
         $position->update($data);