diff --git a/core/src/main/java/com/xujiayao/discord_mc_chat/client/ClientHandler.java b/core/src/main/java/com/xujiayao/discord_mc_chat/client/ClientHandler.java
index 744ddd88..e076a4fe 100644
--- a/core/src/main/java/com/xujiayao/discord_mc_chat/client/ClientHandler.java
+++ b/core/src/main/java/com/xujiayao/discord_mc_chat/client/ClientHandler.java
@@ -154,7 +154,7 @@ public final class ClientHandler extends SimpleChannelInboundHandler<Packet> {
 
 				try {
 					CommandManager.executeAndWait(captureSender, p.command, p.args)
-							.whenComplete((v, ex) -> {
+							.whenComplete((_, ex) -> {
 								ExecuteResponsePacket response;
 								if (ex != null) {
 									response = new ExecuteResponsePacket(p.requestId, I18nManager.getDmccTranslation("commands.execution_failed", ex.getMessage()));
@@ -196,7 +196,7 @@ public final class ClientHandler extends SimpleChannelInboundHandler<Packet> {
 				// Use the completion future with a timeout to send the response reliably
 				completionFuture
 						.orTimeout(CONSOLE_COMMAND_TIMEOUT_SECONDS, TimeUnit.SECONDS)
-						.whenComplete((v, ex) -> ctx.writeAndFlush(new ConsoleResponsePacket(p.requestId, responseBuilder.toString())));
+						.whenComplete((_, _) -> ctx.writeAndFlush(new ConsoleResponsePacket(p.requestId, responseBuilder.toString())));
 			}
 			case ExecuteAutoCompleteRequestPacket p -> {
 				// Handle DMCC command auto-complete with OP level filtering
diff --git a/core/src/main/java/com/xujiayao/discord_mc_chat/network/NetworkManager.java b/core/src/main/java/com/xujiayao/discord_mc_chat/network/NetworkManager.java
index 37061b6b..68018f76 100644
--- a/core/src/main/java/com/xujiayao/discord_mc_chat/network/NetworkManager.java
+++ b/core/src/main/java/com/xujiayao/discord_mc_chat/network/NetworkManager.java
@@ -107,7 +107,7 @@ public final class NetworkManager {
 	 * @param packet The packet to send
 	 */
 	public static void broadcastToClients(Packet packet) {
-		clientChannels.forEach((channel, name) -> channel.writeAndFlush(packet));
+		clientChannels.forEach((channel, _) -> channel.writeAndFlush(packet));
 	}
 
 	/**
diff --git a/core/src/main/java/com/xujiayao/discord_mc_chat/server/linking/LinkedAccountManager.java b/core/src/main/java/com/xujiayao/discord_mc_chat/server/linking/LinkedAccountManager.java
index a5f6cf7a..81e83734 100644
--- a/core/src/main/java/com/xujiayao/discord_mc_chat/server/linking/LinkedAccountManager.java
+++ b/core/src/main/java/com/xujiayao/discord_mc_chat/server/linking/LinkedAccountManager.java
@@ -155,7 +155,7 @@ public final class LinkedAccountManager {
 			return false;
 		}
 
-		LINKED_ACCOUNTS.computeIfAbsent(discordId, k -> new ArrayList<>())
+		LINKED_ACCOUNTS.computeIfAbsent(discordId, _ -> new ArrayList<>())
 				.add(new LinkEntry(minecraftUuid, System.currentTimeMillis(), isOfflineUuid(minecraftUuid) ? minecraftName : null));
 		UUID_TO_DISCORD.put(minecraftUuid, discordId);
 
diff --git a/core/src/main/java/com/xujiayao/discord_mc_chat/standalone/StandaloneDMCC.java b/core/src/main/java/com/xujiayao/discord_mc_chat/standalone/StandaloneDMCC.java
index e3295e89..1db71a37 100644
--- a/core/src/main/java/com/xujiayao/discord_mc_chat/standalone/StandaloneDMCC.java
+++ b/core/src/main/java/com/xujiayao/discord_mc_chat/standalone/StandaloneDMCC.java
@@ -25,7 +25,7 @@ public final class StandaloneDMCC {
 	 *
 	 * @param args Command line arguments
 	 */
-	public static void main(String[] args) {
+	static void main(String[] args) {
 		for (String arg : args) {
 			if ("--disable-ascii".equalsIgnoreCase(arg)) {
 				LoggerImpl.setConsoleAnsiEnabled(false);
diff --git a/core/src/main/java/com/xujiayao/discord_mc_chat/utils/events/EventManager.java b/core/src/main/java/com/xujiayao/discord_mc_chat/utils/events/EventManager.java
index 570587bc..6ae36e54 100644
--- a/core/src/main/java/com/xujiayao/discord_mc_chat/utils/events/EventManager.java
+++ b/core/src/main/java/com/xujiayao/discord_mc_chat/utils/events/EventManager.java
@@ -25,7 +25,7 @@ public final class EventManager {
 	 * @param <T>        The type of the event
 	 */
 	public static <T> void register(Class<T> eventClass, Consumer<T> handler) {
-		handlers.computeIfAbsent(eventClass, k -> new CopyOnWriteArrayList<>()).add(handler);
+		handlers.computeIfAbsent(eventClass, _ -> new CopyOnWriteArrayList<>()).add(handler);
 	}
 
 	/**
diff --git a/minecraft/src/main/java/com/xujiayao/discord_mc_chat/minecraft/commands/MinecraftCommands.java b/minecraft/src/main/java/com/xujiayao/discord_mc_chat/minecraft/commands/MinecraftCommands.java
index d8fb1f6a..feb56d6f 100644
--- a/minecraft/src/main/java/com/xujiayao/discord_mc_chat/minecraft/commands/MinecraftCommands.java
+++ b/minecraft/src/main/java/com/xujiayao/discord_mc_chat/minecraft/commands/MinecraftCommands.java
@@ -63,7 +63,7 @@ public final class MinecraftCommands {
 		var stats = literal("stats")
 				.requires(source -> source.hasPermission(ConfigManager.getInt("command_permission_levels.stats", -1)))
 				.then(argument("type", ResourceLocationArgument.id())
-						.suggests((ctx, builder) -> SharedSuggestionProvider.suggestResource(
+						.suggests((_, builder) -> SharedSuggestionProvider.suggestResource(
 								BuiltInRegistries.STAT_TYPE.keySet(), builder))
 						.then(argument("stat", ResourceLocationArgument.id())
 								.suggests((ctx, builder) -> {