public static byte[] expandCharacterSlots(int mode) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

        mplew.writeShort(SendPacketOpcode.EXPAND_CHARACTER_SLOTS.getValue());
        mplew.writeInt(mode);
        mplew.write(0);

        return mplew.getPacket();
    }