diff --git a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/InetUtils.java b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/InetUtils.java
index d83dfb9e..78600a4f 100644
--- a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/InetUtils.java
+++ b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/InetUtils.java
@@ -1,8 +1,33 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2023 games647 and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 package com.github.games647.fastlogin.bukkit;
 
 import java.net.InetAddress;
 
-public class InetUtils {
+public final class InetUtils {
 
     private InetUtils() {
         // Utility