diff --git a/configuration/common/default.nix b/configuration/common/default.nix
index 8ee1230..0dec223 100644
--- a/configuration/common/default.nix
+++ b/configuration/common/default.nix
@@ -16,7 +16,7 @@
 
   security.sudo.wheelNeedsPassword = false;
 
-  nix.trustedUsers = [ "@wheel" ];
+  nix.settings.trusted-users = [ "@wheel" ];
 
   users.users.clerie = {
     isNormalUser = true;
@@ -35,7 +35,7 @@
 
   services.openssh.enable = true;
   services.openssh.passwordAuthentication = false;
-  services.openssh.challengeResponseAuthentication = false;
+  services.openssh.kbdInteractiveAuthentication = false;
   services.openssh.permitRootLogin = lib.mkDefault "no";
 
   nix.gc = {
@@ -53,7 +53,7 @@
   };
 
   security.acme = {
-    email = "letsencrypt@clerie.de";
+    defaults.email = "letsencrypt@clerie.de";
     acceptTerms = true;
   };