diff --git a/systems/common.nix b/systems/common.nix
index 26fe648..3afba5e 100644
--- a/systems/common.nix
+++ b/systems/common.nix
@@ -40,7 +40,7 @@
   nix = {
     gc = {
       automatic = true;
-      dates = "3d";
+      dates = "weekly";
       options = "-d";
     };