diff --git a/app/Http/Controllers/Admin/ConfigController.php b/app/Http/Controllers/Admin/ConfigController.php
index 013bbb5a..a2c0f053 100755
--- a/app/Http/Controllers/Admin/ConfigController.php
+++ b/app/Http/Controllers/Admin/ConfigController.php
@@ -11,6 +11,7 @@ class ConfigController extends Controller
 {
     public function fetch()
     {
+        // TODO: default should be in Dict
         return response([
             'data' => [
                 'invite' => [
@@ -24,6 +25,7 @@ class ConfigController extends Controller
                     'stop_register' => (int)config('v2board.stop_register', 0),
                     'email_verify' => (int)config('v2board.email_verify', 0),
                     'app_name' => config('v2board.app_name', 'V2Board'),
+                    'app_description' => config('v2board.app_description', 'V2Board is best!'),
                     'app_url' => config('v2board.app_url'),
                     'subscribe_url' => config('v2board.subscribe_url'),
                     'plan_change_enable' => (int)config('v2board.plan_change_enable', 1),
diff --git a/app/Http/Controllers/Admin/UserController.php b/app/Http/Controllers/Admin/UserController.php
index 114f4634..5a036f07 100644
--- a/app/Http/Controllers/Admin/UserController.php
+++ b/app/Http/Controllers/Admin/UserController.php
@@ -15,14 +15,12 @@ class UserController extends Controller
     {
         $current = $request->input('current') ? $request->input('current') : 1;
         $pageSize = $request->input('pageSize') >= 10 ? $request->input('pageSize') : 10;
-        $sortType = $request->input('sort_type') ? 'ASC' : 'DESC';
-        $userModel = User::orderBy('created_at', 'DESC');
+        $sortType = in_array($request->input('sort_type'), ['ASC', 'DESC']) ? $request->input('sort_type') : 'DESC';
+        $sort = $request->input('sort') ? $request->input('sort') : 'created_at';
+        $userModel = User::orderBy($sort, $sortType);
         if ($request->input('email')) {
             $userModel->where('email', $request->input('email'));
         }
-        if ($request->input('sort')) {
-            $userModel->orderBy($request->input('sort'), $sortType);
-        }
         $total = $userModel->count();
         $res = $userModel->forPage($current, $pageSize)
             ->get();
diff --git a/app/Http/Requests/Admin/ConfigSave.php b/app/Http/Requests/Admin/ConfigSave.php
index c24cfcd2..9f8c40e0 100755
--- a/app/Http/Requests/Admin/ConfigSave.php
+++ b/app/Http/Requests/Admin/ConfigSave.php
@@ -15,6 +15,7 @@ class ConfigSave extends FormRequest
         'stop_register' => 'in:0,1',
         'email_verify' => 'in:0,1',
         'app_name' => '',
+        'app_description' => '',
         'app_url' => 'url',
         'subscribe_url' => 'url',
         'plan_transfer_hour' => 'numeric',