diff --git a/configuration.nix b/configuration.nix
index ee25c38..b28b711 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -45,6 +45,16 @@
     rsync
   ];
 
+  zramSwap = {
+    enable = true;
+    memoryPercent = 50;
+  };
+
+  services.openssh.hostKeys = [{
+    path = "/etc/ssh/ssh_host_ed25519_key";
+    type = "ed25519";
+  }];
+
   users.users.root.openssh.authorizedKeys.keys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE40ISu3ydCqfdpb26JYD5cIN0Fu0id/FDS+xjB5zpqu jetthomaspham@gmail.com"
   ];