diff --git a/nixos/modules/services/networking/adguardhome.nix b/nixos/modules/services/networking/adguardhome.nix
index 3d700d4584c4..1df503146b54 100644
--- a/nixos/modules/services/networking/adguardhome.nix
+++ b/nixos/modules/services/networking/adguardhome.nix
@@ -196,11 +196,42 @@ in
       serviceConfig = {
         DynamicUser = true;
         ExecStart = "${lib.getExe cfg.package} ${args}";
+        CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" ] ++ lib.optionals cfg.allowDHCP [ "CAP_NET_RAW" ];
         AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ] ++ lib.optionals cfg.allowDHCP [ "CAP_NET_RAW" ];
         Restart = "always";
         RestartSec = 10;
         RuntimeDirectory = "AdGuardHome";
         StateDirectory = "AdGuardHome";
+        SystemCallFilter = [
+          "@system-service"
+          "~@privileged"
+          "~@resources"
+        ];
+        SystemCallArchitectures = "native";
+        DevicePolicy = "closed";
+        LockPersonality = true;
+        NoNewPrivileges = true;
+        PrivateTmp = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        RestrictAddressFamilies = [
+          "AF_NETLINK"
+          "AF_INET"
+          "AF_INET6"
+        ]
+        ++ lib.optionals cfg.allowDHCP [ "AF_PACKET" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        UMask = "0077";
       };
     };