diff --git a/global/software-configuration.nix b/global/software-configuration.nix
index 1bd718d..5d9c615 100644
--- a/global/software-configuration.nix
+++ b/global/software-configuration.nix
@@ -15,7 +15,7 @@ in
       banner = "Must back to QingDao! Must back HOME!";
 
       settings = {
-        PermitRootLogin = false;
+        PermitRootLogin = "no";
         PasswordAuthentication = false;
       };
     };
@@ -91,6 +91,5 @@ in
     libraspberrypi
   ];
 
-  programs = {
-  };
+  programs = { };
 }