diff --git a/nixos/hosts/silver/configuration.nix b/nixos/hosts/silver/configuration.nix
index 2f287a1..1833486 100644
--- a/nixos/hosts/silver/configuration.nix
+++ b/nixos/hosts/silver/configuration.nix
@@ -95,5 +95,12 @@ in {
     hostKeys = ["/persist/etc/secrets/initrd/ssh_host_ed25519_key"];
   };
 
+  # Periodic nix gc
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 30d";
+  };
+
   system.stateVersion = "24.05";
 }