diff --git a/src/main/java/mc/core/network/proto_125/netty/PacketManager.java b/src/main/java/mc/core/network/proto_125/netty/PacketManager.java
index 0b089f1..6308d24 100644
--- a/src/main/java/mc/core/network/proto_125/netty/PacketManager.java
+++ b/src/main/java/mc/core/network/proto_125/netty/PacketManager.java
@@ -11,13 +11,13 @@ import mc.core.network.SCPacket;
 import mc.core.network.proto_125.packets.*;
 
 public class PacketManager {
-    private static final BiMap<Integer, Class<?>> packetMap = ImmutableBiMap.of(
-            0x01, LoginPacket.class,
-            0x02, HandshakePacket.class,
-            0x0D, PositionAndLookPacket.class,
-            0xFE, PingPacket.class,
-            0xFF, KickPacket.class
-    );
+    private static final BiMap<Integer, Class<?>> packetMap = ImmutableBiMap.<Integer, Class<?>>builder()
+            .put(0x01, LoginPacket.class)
+            .put(0x02, HandshakePacket.class)
+            .put(0x0D, PositionAndLookPacket.class)
+            .put(0xFE, PingPacket.class)
+            .put(0xFF, KickPacket.class)
+            .build();
 
     @SuppressWarnings("unchecked")
     public static Class<? extends CSPacket> getClientSidePacket(int id) {