diff --git a/system/configuration.nix b/system/configuration.nix
index 678891a..3dfb7b7 100644
--- a/system/configuration.nix
+++ b/system/configuration.nix
@@ -137,8 +137,8 @@
   nix = {
     gc = {
       automatic = true;
-      dates = "daily";
-      options = "--delete-older-than 3d";
+      dates = "monthly";
+      options = "--delete-older-than 7d";
     };
     settings = {
       auto-optimise-store = true;