diff --git a/nixos/common/modules/nixos.nix b/nixos/common/modules/nixos.nix
index 2a3f9ca8..cfac3b9b 100644
--- a/nixos/common/modules/nixos.nix
+++ b/nixos/common/modules/nixos.nix
@@ -11,6 +11,6 @@
   nix.gc = {
     automatic = true;
     dates = "daily";
-    options = "--delete-older-than 7d";
+    options = "--delete-older-than 30d";
   };
 }