diff --git a/config/nixos/hardware/mennos-server/zfs.nix b/config/nixos/hardware/mennos-server/zfs.nix
index fd847c2..075c38c 100644
--- a/config/nixos/hardware/mennos-server/zfs.nix
+++ b/config/nixos/hardware/mennos-server/zfs.nix
@@ -71,6 +71,7 @@ in
 
   # If you want to keep compression settings
   boot.kernelParams = [ "zfs.zfs_compressed_arc_enabled=1" ];
+  boot.kernelParams = [ "zfs.zfs_arc_max=17179869184" ]; # 16 GiB
 
   fileSystems = {
     # backup ZFS mount points