diff --git a/custom/networking/packets/clientbound/play/block_change_packet.py b/custom/networking/packets/clientbound/play/block_change_packet.py
index f016b2f..baea571 100644
--- a/custom/networking/packets/clientbound/play/block_change_packet.py
+++ b/custom/networking/packets/clientbound/play/block_change_packet.py
@@ -1,20 +1,12 @@
 from minecraft.networking.packets import Packet
 from minecraft.networking.types import (
     VarInt, Integer, UnsignedByte, Position, Vector, MutableRecord,
-    attribute_alias, multi_attribute_alias,
+    attribute_alias, multi_attribute_alias, Long, Boolean, VarLong,
 )
 
 
 class BlockChangePacket(Packet):
-    @staticmethod
-    def get_id(context):
-        return 0x0C if context.protocol_version >= 550 else \
-               0x0B if context.protocol_version >= 332 else \
-               0x0C if context.protocol_version >= 318 else \
-               0x0B if context.protocol_version >= 67 else \
-               0x24 if context.protocol_version >= 62 else \
-               0x23
-
+    id = 0x0B
     packet_name = 'block change'
     definition = [
         {'location': Position},
@@ -44,15 +36,7 @@ class BlockChangePacket(Packet):
 
 
 class MultiBlockChangePacket(Packet):
-    @staticmethod
-    def get_id(context):
-        return 0x10 if context.protocol_version >= 550 else \
-               0x0F if context.protocol_version >= 343 else \
-               0x10 if context.protocol_version >= 332 else \
-               0x11 if context.protocol_version >= 318 else \
-               0x10 if context.protocol_version >= 67 else \
-               0x22
-
+    id = 0x3B
     packet_name = 'multi block change'
 
     fields = 'chunk_x', 'chunk_z', 'records'
@@ -92,29 +76,35 @@ class MultiBlockChangePacket(Packet):
         blockStateId = attribute_alias('block_state_id')
 
         def read(self, file_object, parent):
-            h_position = UnsignedByte.read(file_object)
-            self.x, self.z = h_position >> 4, h_position & 0xF
-            self.y = UnsignedByte.read(file_object)
-            self.block_state_id = VarInt.read(file_object)
+            data = VarLong.read(file_object)
+            self.block_state_id = int(data >> 12)
+            self.x = int(data >> 8 & 0xf)
+            self.z = int(data >> 4 & 0xf)
+            self.y = int(data & 0xf)
             # Absolute position in world to be compatible with BlockChangePacket
             self.location = Vector(self.position.x + parent.chunk_x*16, self.position.y, self.position.z + parent.chunk_z*16)
 
         def write(self, packet_buffer):
+            raise
             UnsignedByte.send(self.x << 4 | self.z & 0xF, packet_buffer)
             UnsignedByte.send(self.y, packet_buffer)
             VarInt.send(self.block_state_id, packet_buffer)
 
     def read(self, file_object):
-        self.chunk_x = Integer.read(file_object)
-        self.chunk_z = Integer.read(file_object)
-        records_count = VarInt.read(file_object)
+        coords = Long.read(file_object)
+        self.chunk_x = int(coords >> 42 & 0x3fffff)
+        self.chunk_z = int(coords >> 20 & 0x3fffff)
+        self.chunk_y = int(coords & 0xfffff)
+        self.unknown = Boolean.read(file_object)
+        array_size = VarInt.read(file_object)
         self.records = []
-        for i in range(records_count):
+        for i in range(array_size):
             record = self.Record()
             record.read(file_object, self)
             self.records.append(record)
 
     def write_fields(self, packet_buffer):
+        raise
         Integer.send(self.chunk_x, packet_buffer)
         Integer.send(self.chunk_z, packet_buffer)
         VarInt.send(len(self.records), packet_buffer)
diff --git a/start.py b/start.py
index ae55275..e6ee3a9 100644
--- a/start.py
+++ b/start.py
@@ -6,7 +6,7 @@ import re
 from optparse import OptionParser
 
 from custom.managers import DataManager, ChunksManager
-from custom.networking.packets.clientbound.play import chunk_data
+from custom.networking.packets.clientbound.play import chunk_data, block_change_packet
 
 import minecraft.networking.packets
 
@@ -15,6 +15,8 @@ def get_packets(old_get_packets):
         print('Monkey-patched.')
         packets = func(context)
         packets.add(chunk_data.ChunkDataPacket)
+        packets.add(block_change_packet.BlockChangePacket)
+        packets.add(block_change_packet.MultiBlockChangePacket)
         return packets
     return lambda x: wrapper(old_get_packets, x)
 
@@ -124,18 +126,12 @@ def main():
         print("Message (%s): %s" % (
             chat_packet.field_string('position'), chat_packet.json_data))
 
-    #chunks = ChunksManager(mcdata)
-    #chunks.register(connection)
+    chunks = ChunksManager(mcdata)
+    chunks.register(connection)
 
     connection.register_packet_listener(
         print_chat, clientbound.play.ChatMessagePacket)
 
-    def handle_chunk(chunk_packet):
-        print(chunk_packet)
-
-    def register(self, connection):
-        connection.register_packet_listener(handle_chunk, chunk_data.ChunkDataPacket)
-
     connection.connect()
 
     while True: