diff --git a/flake.lock b/flake.lock
index 3057fba..4367ecf 100644
--- a/flake.lock
+++ b/flake.lock
@@ -223,11 +223,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1734043726,
-        "narHash": "sha256-e9YAMReFV1fDPcZLFC2pa4k/8TloSXeX0z2VysNMAoA=",
+        "lastModified": 1735774425,
+        "narHash": "sha256-C73gLFnEh8ZI0uDijUgCDWCd21T6I6tsaWgIBHcfAXg=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "3066cc58f552421a2c5414e78407fa5603405b1e",
+        "rev": "5f6aa268e419d053c3d5025da740e390b12ac936",
         "type": "github"
       },
       "original": {
@@ -244,11 +244,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1733085484,
-        "narHash": "sha256-dVmNuUajnU18oHzBQWZm1BQtANCHaqNuxTHZQ+GN0r8=",
+        "lastModified": 1735774425,
+        "narHash": "sha256-C73gLFnEh8ZI0uDijUgCDWCd21T6I6tsaWgIBHcfAXg=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "c1fee8d4a60b89cae12b288ba9dbc608ff298163",
+        "rev": "5f6aa268e419d053c3d5025da740e390b12ac936",
         "type": "github"
       },
       "original": {
@@ -274,11 +274,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1733759999,
-        "narHash": "sha256-463SNPWmz46iLzJKRzO3Q2b0Aurff3U1n0nYItxq7jU=",
+        "lastModified": 1735471104,
+        "narHash": "sha256-0q9NGQySwDQc7RhAV2ukfnu7Gxa5/ybJ2ANT8DQrQrs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "a73246e2eef4c6ed172979932bc80e1404ba2d56",
+        "rev": "88195a94f390381c6afcdaa933c2f6ff93959cb4",
         "type": "github"
       },
       "original": {
@@ -325,11 +325,11 @@
         "plugins-typst-preview": "plugins-typst-preview"
       },
       "locked": {
-        "lastModified": 1732647323,
+        "lastModified": 1735888819,
         "narHash": "sha256-kvGiJ3ANwrvxbQVNHPhnimOBxQXnAaUvL9yJKwkmgBs=",
         "owner": "kaitotlex",
         "repo": "vix1",
-        "rev": "ab175943cfd30f34dc74693203293c42b3dc9406",
+        "rev": "401ae3ccd6ef8c65562e37013c3314cf79ad9641",
         "type": "github"
       },
       "original": {
@@ -405,11 +405,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1734063436,
-        "narHash": "sha256-wE1sIAnsjWbyXXjwC/+oxSFXFDCROiwLY1pSQ7pU9js=",
+        "lastModified": 1735877772,
+        "narHash": "sha256-6OT4xYCwZTJ9qK28NNM98ibFZinwrJK/sRlg+dDqdJs=",
         "owner": "Gerg-L",
         "repo": "spicetify-nix",
-        "rev": "7981c1e87aa1adeec524524db52f75bf6598fb55",
+        "rev": "0227d83d2eb29189b8ed8d180e2442ada633dd0d",
         "type": "github"
       },
       "original": {
@@ -437,11 +437,11 @@
         "tinted-tmux": "tinted-tmux"
       },
       "locked": {
-        "lastModified": 1734012548,
-        "narHash": "sha256-72z7fZNeFtG+UWmbMn5by4K47HHBxk3JtV91D/qZEhg=",
+        "lastModified": 1735864066,
+        "narHash": "sha256-V1JmPXW3vmxCuvf+IItGlLgBH8rolUahCMFyglxy19s=",
         "owner": "danth",
         "repo": "stylix",
-        "rev": "ccee633284cde8a9f825004e00dd84a31b10e6c6",
+        "rev": "0ce2a52decf36d815065f8cda06586ed59ed3ef7",
         "type": "github"
       },
       "original": {
@@ -518,11 +518,11 @@
     "wallpapers": {
       "flake": false,
       "locked": {
-        "lastModified": 1734063676,
-        "narHash": "sha256-7sSuQzPeVJEC/UIgNjGIXSAciSwRnp+Uwa/cp9AV8TQ=",
+        "lastModified": 1734808343,
+        "narHash": "sha256-UiQiociS1AuVNJ5jJhc2N+nyIwhOpE5rq0AywZVmlc8=",
         "owner": "kaitotlex",
         "repo": "wallpaper",
-        "rev": "062dde476c641c5234f6286615a61561b2b5c877",
+        "rev": "3bdc71d6bcd517215a5aacaa5d0e8a7018371bf3",
         "type": "github"
       },
       "original": {
diff --git a/hosts/shiroko/configuration.nix b/hosts/shiroko/configuration.nix
index 1eb64ad..e71243c 100644
--- a/hosts/shiroko/configuration.nix
+++ b/hosts/shiroko/configuration.nix
@@ -114,9 +114,25 @@
   };
 
   # Set your time zone.
-  time.timeZone = "Asia/Taipei"; # lib.mkDefault
+  #time.timeZone = "Americas/"; # Asia/Taipei lib.mkDefault
   #services.automatic-timezoned.enable = true;
+  time.timeZone = lib.mkForce null;
+  services.timesyncd.enable = true;
+  systemd.services = {
+    # Ensure network uplink on boot
+    NetworkManager-wait-online.enable = true;
 
+    # Automatic time zone switching
+    updateTimezone = {
+      description = "Automatically update timezone using `timedatectl` and `tzupdate`";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      requires = [ "network-online.target" ];
+      script = ''
+        timedatectl set-timezone $("${pkgs.tzupdate}/bin/tzupdate" -p)
+      '';
+    };
+  };
   # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
 
diff --git a/users/kaitotlex/home.nix b/users/kaitotlex/home.nix
index 5ea2764..cc0a680 100644
--- a/users/kaitotlex/home.nix
+++ b/users/kaitotlex/home.nix
@@ -24,7 +24,7 @@
     # feel free to add your own or remove some of them
     #davinci-resolve
     rasm
-
+    arduino-language-server
     geoclue2
     lua
     tetrio-desktop