diff --git a/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs b/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
index 53fe1df6..6dc63db0 100644
--- a/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
@@ -347,7 +347,7 @@ namespace ServiceLib.ViewModels
             _config.TunModeItem.EnableIPv6Address = TunEnableIPv6Address;
             if (TunLinuxSudoPassword != _config.TunModeItem.LinuxSudoPwd)
             {
-                _config.TunModeItem.LinuxSudoPwd = DesUtils.Encrypt(TunLinuxSudoPassword);
+                _config.TunModeItem.LinuxSudoPwd = AesUtils.Encrypt(TunLinuxSudoPassword);
             }
 
             //coreType
@@ -405,4 +405,4 @@ namespace ServiceLib.ViewModels
             }
         }
     }
-}
\ No newline at end of file
+}