diff --git a/config/nixos/hardware/mennos-server/zfs.nix b/config/nixos/hardware/mennos-server/zfs.nix
index 005fc54..58a1297 100644
--- a/config/nixos/hardware/mennos-server/zfs.nix
+++ b/config/nixos/hardware/mennos-server/zfs.nix
@@ -73,7 +73,7 @@ in
   # If you want to keep compression settings
   boot.kernelParams = [
     "zfs.zfs_compressed_arc_enabled=1" # Enable compressed ARC
-    "zfs.zfs_arc_max=17179869184" # 16 GiB
+    "zfs.zfs_arc_max=21474836480" # 20 GiB
   ];
 
   fileSystems = {