diff --git a/machines/mac/configuration.nix b/machines/mac/configuration.nix
index 71faf22..1ebbcd4 100644
--- a/machines/mac/configuration.nix
+++ b/machines/mac/configuration.nix
@@ -71,7 +71,10 @@
     extraOptions = ''
       experimental-features = nix-command flakes
     '';
-    settings.auto-optimise-store = false;
+    settings = {
+      auto-optimise-store = false;
+      trusted-users = ["root" "michael"];
+    };
   };
 
   system = {
diff --git a/modules/nix.nix b/modules/nix.nix
index 01aba7e..ee90d45 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -12,6 +12,7 @@
       dates = "weekly";
       options = "--delete-older-than 30d";
     };
+    trustedUsers = ["root" "michael"];
   };
 
   nixpkgs.config = {