diff --git a/src/pocketmine/network/mcpe/NetworkBinaryStream.php b/src/pocketmine/network/mcpe/NetworkBinaryStream.php
index aceb3c60c..b0d75682a 100644
--- a/src/pocketmine/network/mcpe/NetworkBinaryStream.php
+++ b/src/pocketmine/network/mcpe/NetworkBinaryStream.php
@@ -105,7 +105,7 @@ class NetworkBinaryStream extends BinaryStream{
 			if($c !== 1){
 				throw new BadPacketException("Unexpected NBT count $c");
 			}
-			$compound = (new NetworkNbtSerializer())->read($this->buffer, $this->offset)->getTag();
+			$compound = (new NetworkNbtSerializer())->read($this->buffer, $this->offset, 512)->getTag();
 		}elseif($nbtLen !== 0){
 			throw new BadPacketException("Unexpected fake NBT length $nbtLen");
 		}
diff --git a/src/pocketmine/network/mcpe/handler/SimpleSessionHandler.php b/src/pocketmine/network/mcpe/handler/SimpleSessionHandler.php
index 724f19ea3..640764c84 100644
--- a/src/pocketmine/network/mcpe/handler/SimpleSessionHandler.php
+++ b/src/pocketmine/network/mcpe/handler/SimpleSessionHandler.php
@@ -436,7 +436,8 @@ class SimpleSessionHandler extends SessionHandler{
 
 		$block = $this->player->getLevel()->getBlock($pos);
 		try{
-			$nbt = (new NetworkNbtSerializer())->read($packet->namedtag)->getTag();
+			$offset = 0;
+			$nbt = (new NetworkNbtSerializer())->read($packet->namedtag, $offset, 512)->getTag();
 		}catch(NbtDataException $e){
 			throw new BadPacketException($e->getMessage(), 0, $e);
 		}