diff --git a/app/Http/Controllers/MeteMaskLoginController.php b/app/Http/Controllers/MeteMaskLoginController.php
index d5a3f89..daeecbc 100644
--- a/app/Http/Controllers/MeteMaskLoginController.php
+++ b/app/Http/Controllers/MeteMaskLoginController.php
@@ -21,9 +21,9 @@ class MeteMaskLoginController extends Controller
     public function mateMaskLogin(Request $request)
     {
         $account = strtolower($request->get('account', ''));
-        $tips = strtolower($request->get('tips', ''));
-        $nonce = strtolower($request->get('nonce', ''));
-        $signature = strtolower($request->get('signature', ''));
+        $tips = $request->get('tips', '');
+        $nonce = $request->get('nonce', '');
+        $signature = $request->get('signature', '');
         $param = [
             'c' => 'BcService',
             'a' => 'authVerifySignature',