diff --git a/configuration.nix b/configuration.nix
index 87a431f..a06f8dd 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -93,6 +93,7 @@
     enable = true;
     # Only allow login through pubkey
     passwordAuthentication = false;
+    challengeResponseAuthentication = false;
     extraConfig = "PubkeyAcceptedAlgorithms +ssh-rsa";
   };
   # Support mosh connections