diff --git a/flake.nix b/flake.nix
index a38cd85..d403c08 100644
--- a/flake.nix
+++ b/flake.nix
@@ -33,5 +33,14 @@
     };
   };
 
+  nixConfig = {
+    extra-substituters = [
+      "https://cache.dynamicdiscord.de"
+    ];
+    extra-trusted-public-keys = [
+      "cache.dynamicdiscord.de:DKueZicqi2NhJJXz9MYgUbiyobMs10fTyHCgAUibRP4="
+    ];
+  };
+
   outputs = { ... } @ args: import ./outputs.nix args;
 }
diff --git a/machines/configuration.nix b/machines/configuration.nix
index 0352594..a69a40f 100644
--- a/machines/configuration.nix
+++ b/machines/configuration.nix
@@ -28,8 +28,9 @@ let
                 "https://cache.nixos.org/"
               ];
               trusted-public-keys = [
-                "cache.dynamicdiscord.de-1:zWXTUJmfigHZ883fv52KZU6VFlivyNVVP2y7mvHtYeE="
+                "cache.dynamicdiscord.de:DKueZicqi2NhJJXz9MYgUbiyobMs10fTyHCgAUibRP4="
               ];
+              trusted-users = [ "root" "@wheel" ];
             };
           };
         })