diff --git a/modules/common/default.nix b/modules/common/default.nix
index c27155f..72afcc8 100644
--- a/modules/common/default.nix
+++ b/modules/common/default.nix
@@ -35,7 +35,10 @@ in
 
   programs.mosh.enable = true;
   services = {
-    openssh.enable = true;
+    openssh = { 
+      enable = true;
+      permitRootLogin = "no";
+    };
   };
 
   # Select internationalisation properties.