diff --git a/hosts/kabtopci/default.nix b/hosts/kabtopci/default.nix
index 7f2e72d..66f3154 100644
--- a/hosts/kabtopci/default.nix
+++ b/hosts/kabtopci/default.nix
@@ -30,11 +30,10 @@
     kernelPackages = pkgs.linuxPackages_latest;
 
     loader = {                              # EFI Boot
-      systemd-boot.enable = true;
-      efi = {
-        canTouchEfiVariables = true;
-        efiSysMountPoint = "/boot";
-      };
+    grub = {
+        enable = true;
+        device = "/dev/vda";
+     };
       timeout = 1;                          # Grub auto select time
     };
   };
diff --git a/hosts/kabtopci/hardware-configuration.nix b/hosts/kabtopci/hardware-configuration.nix
index 2558e6f..7a70e72 100644
--- a/hosts/kabtopci/hardware-configuration.nix
+++ b/hosts/kabtopci/hardware-configuration.nix
@@ -54,7 +54,7 @@
   fileSystems."/var" =
     { device = "/dev/disk/by-label/NIXROOT";
       fsType = "btrfs";
-      options = [ "compress=zstd,space_cache=v2,ssd,noatime,subvol=@var,discard=async" ];
+      options = [ "space_cache=v2,ssd,noatime,subvol=@var,discard=async" ];
     };
 
   fileSystems."/nix" =
@@ -104,4 +104,6 @@
       allowedTCPPorts = [ 80 443 ];
     };
   };
+
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 }