diff --git a/config/sms.php b/config/sms.php
index 24c1f84..ecb79ee 100644
--- a/config/sms.php
+++ b/config/sms.php
@@ -11,7 +11,7 @@
             'level' => env('SMS_LOG_LEVEL', 'info'),
         ],
         'yunpian' => [
-            'driver' => Overtrue\EasySms\Gateways\YunpianGateway::class,
+            'driver' => \Overtrue\EasySms\Gateways\YunpianGateway::class,
             'api_key' => env('SMS_YUNPIAN_API_KEY'),
             'signature' => env('SMS_YUNPIAN_SIGNATURE', ''),
         ],