diff --git a/hosts/sesame/configuration.nix b/hosts/sesame/configuration.nix
index 2306301..e2567c1 100644
--- a/hosts/sesame/configuration.nix
+++ b/hosts/sesame/configuration.nix
@@ -72,7 +72,7 @@
   nix.gc = {
     automatic = true;
     dates = "weekly";
-    options = "--delete-older-than 1w";
+    options = "--delete-older-than 7d";
   };
   nix.settings.auto-optimise-store = true;