diff --git a/hosts/common.nix b/hosts/common.nix
index e1c850b..e795c64 100644
--- a/hosts/common.nix
+++ b/hosts/common.nix
@@ -19,7 +19,7 @@
   nix = {
     optimise = {
       automatic = true;
-      dates = [ "11:00" ];
+      dates = "weekly";
     };
     settings = {
       auto-optimise-store = true;
@@ -36,6 +36,7 @@
     };
     gc = {
       automatic = true;
+      dates = "weekly";
       options = "--delete-older-than 14d";
     };
   };