diff --git a/reference/hosts/adrastea/configuration.nix b/reference/hosts/adrastea/configuration.nix
index b38422d..ccdef27 100755
--- a/reference/hosts/adrastea/configuration.nix
+++ b/reference/hosts/adrastea/configuration.nix
@@ -8,7 +8,7 @@
   lib,
   ...
 }:
-{
+rec {
   imports = [ ./hardware-configuration.nix ];
 
   networking.hostName = "adrastea";
@@ -92,12 +92,24 @@
 
   nixpkgs.config.allowUnfree = true;
 
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system = {
+    # This value determines the NixOS release from which the default
+    # settings for stateful data, like file locations and database versions
+    # on your system were taken. It‘s perfectly fine and recommended to leave
+    # this value at the release version of the first install of this system.
+    # Before changing this value read the documentation for this option
+    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+    stateVersion = "24.05"; # Did you read the comment?
+    
+    # Automatically rebuild system daily
+    autoUpgrade = {
+      enable = true;
+      flake = liminalOS.flakeLocation;
+      flags = [
+        "-L" # print build logs
+      ];
+      dates = "daily";
+    };
+  };
 
 }
diff --git a/reference/hosts/callisto/configuration.nix b/reference/hosts/callisto/configuration.nix
index b3b64e5..9c25884 100755
--- a/reference/hosts/callisto/configuration.nix
+++ b/reference/hosts/callisto/configuration.nix
@@ -7,7 +7,7 @@
   lib,
   ...
 }:
-{
+rec {
   imports = [ ./hardware-configuration.nix ];
 
   networking.hostName = "callisto";
@@ -74,5 +74,17 @@
     };
   };
 
-  system.stateVersion = "24.11";
+  system = {
+    stateVersion = "24.11";
+    
+    # Automatically rebuild system daily
+    autoUpgrade = {
+      enable = true;
+      flake = liminalOS.flakeLocation;
+      flags = [
+        "-L" # print build logs
+      ];
+      dates = "daily";
+    };
+  };
 }
diff --git a/reference/hosts/cassini/configuration.nix b/reference/hosts/cassini/configuration.nix
index f8c1e2b..e49c7ce 100755
--- a/reference/hosts/cassini/configuration.nix
+++ b/reference/hosts/cassini/configuration.nix
@@ -6,7 +6,7 @@
   inputs,
   ...
 }:
-{
+rec {
   networking.hostName = "cassini"; # Define your hostname.
 
   liminalOS = {
@@ -43,11 +43,23 @@
 
   nixpkgs.hostPlatform = "x86_64-linux";
 
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system = {
+    # This value determines the NixOS release from which the default
+    # settings for stateful data, like file locations and database versions
+    # on your system were taken. It‘s perfectly fine and recommended to leave
+    # this value at the release version of the first install of this system.
+    # Before changing this value read the documentation for this option
+    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+    stateVersion = "24.05"; # Did you read the comment?
+    
+    # Automatically rebuild system daily
+    autoUpgrade = {
+      enable = true;
+      flake = liminalOS.flakeLocation;
+      flags = [
+        "-L" # print build logs
+      ];
+      dates = "daily";
+    };
+  };
 }
diff --git a/reference/hosts/demeter/configuration.nix b/reference/hosts/demeter/configuration.nix
index a53c027..b9611ae 100755
--- a/reference/hosts/demeter/configuration.nix
+++ b/reference/hosts/demeter/configuration.nix
@@ -6,7 +6,7 @@
   pkgs,
   ...
 }:
-{
+rec {
   imports = [
     ./hardware-configuration.nix
   ];
@@ -67,11 +67,23 @@
       "/dev/disk/by-uuid/af320a0f-b388-43f5-b5a3-af2b47cfc716";
   };
 
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system = {
+    # This value determines the NixOS release from which the default
+    # settings for stateful data, like file locations and database versions
+    # on your system were taken. It‘s perfectly fine and recommended to leave
+    # this value at the release version of the first install of this system.
+    # Before changing this value read the documentation for this option
+    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+    stateVersion = "24.05"; # Did you read the comment?
+    
+    # Automatically rebuild system daily
+    autoUpgrade = {
+      enable = true;
+      flake = liminalOS.flakeLocation;
+      flags = [
+        "-L" # print build logs
+      ];
+      dates = "daily";
+    };
+  };
 }
diff --git a/reference/modules/default.nix b/reference/modules/default.nix
index b6966a8..8fc9862 100644
--- a/reference/modules/default.nix
+++ b/reference/modules/default.nix
@@ -66,6 +66,22 @@
         ExecStart = "/nix/var/nix/profiles/system/bin/switch-to-configuration test";
       };
     };
+    refresh = let 
+      flakeLocation = "/home/youwen/.config/liminalOS";
+    in {
+      description = "Automatically update liminalOS";
+      after = [ "network-online.target" ];
+      requires = [ "network-online.target" ];
+      script = ''
+        cd ${flakeLocation}
+        ${pkgs.git}/bin/git config --global --add safe.directory ${flakeLocation}
+        ${pkgs.git}/bin/git pull
+      '';
+      serviceConfig = {
+        Environment = "HOME=/root";
+      };
+      wantedBy = [ ];
+    };
   };
   systemd.timers = {
     colorscheme-dawn = {
@@ -86,6 +102,15 @@
         Unit = "colorscheme-dusk.service";
       };
     };
+    refresh = {
+      description = "Schedule daily system updates";
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "daily";
+        Persistent = true;
+        Unit = "refresh.service";
+      };
+    };
   };
 
   security.polkit.extraConfig = ''
diff --git a/templates/minimal/configuration.nix b/templates/minimal/configuration.nix
index 649b972..02a7ae3 100755
--- a/templates/minimal/configuration.nix
+++ b/templates/minimal/configuration.nix
@@ -6,7 +6,7 @@
   inputs,
   ...
 }:
-{
+rec {
   imports = [
     # Important: you should replace hardware-configuration.nix with your actual
     # hardware-configuration.nix generated during NixOS installation, located
@@ -95,11 +95,23 @@
     };
   };
 
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "24.05"; # Did you read the comment?
+  system = {
+    # This value determines the NixOS release from which the default
+    # settings for stateful data, like file locations and database versions
+    # on your system were taken. It‘s perfectly fine and recommended to leave
+    # this value at the release version of the first install of this system.
+    # Before changing this value read the documentation for this option
+    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+    stateVersion = "24.05"; # Did you read the comment?
+    
+    # Automatically rebuild system daily
+    autoUpgrade = {
+      enable = true;
+      flake = liminalOS.flakeLocation;
+      flags = [
+        "-L" # print build logs
+      ];
+      dates = "daily";
+    };
+  };
 }