diff --git a/src/network/mcpe/convert/RuntimeBlockMapping.php b/src/network/mcpe/convert/RuntimeBlockMapping.php
index 23c1e8587..10f8f30b3 100644
--- a/src/network/mcpe/convert/RuntimeBlockMapping.php
+++ b/src/network/mcpe/convert/RuntimeBlockMapping.php
@@ -23,14 +23,12 @@ declare(strict_types=1);
 
 namespace pocketmine\network\mcpe\convert;
 
-use pocketmine\block\BlockFactory;
-use pocketmine\block\UnknownBlock;
 use pocketmine\data\bedrock\blockstate\BlockStateData;
 use pocketmine\data\bedrock\blockstate\BlockStateSerializeException;
+use pocketmine\data\bedrock\blockstate\BlockStateSerializer;
 use pocketmine\data\bedrock\blockstate\BlockTypeNames;
 use pocketmine\data\bedrock\blockstate\CachingBlockStateSerializer;
 use pocketmine\data\bedrock\blockstate\convert\BlockObjectToBlockStateSerializer;
-use pocketmine\data\bedrock\blockstate\convert\BlockStateSerializer;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\utils\AssumptionFailedError;
 use pocketmine\utils\SingletonTrait;