diff --git a/modules/generic.nix b/modules/generic.nix
index f2c5c21..a4de81f 100644
--- a/modules/generic.nix
+++ b/modules/generic.nix
@@ -40,7 +40,9 @@ in
 
   system.autoUpgrade = {
     enable = true;
-    allowReboot = true;
+    #allowReboot = true;
+    dates = "04:00";
+    randomizedDelaySec = "30min";
   };
 
   services = {
@@ -71,6 +73,11 @@ in
     (import ./vim.nix)
   ];
 
+  nix.gc = {
+    automatic = true;
+    options = "--delete-older-than 2d";
+  };
+
   imports = [
     ./zabbix-agent.nix
   ];