diff --git a/src/network/mcpe/auth/ProcessLoginTask.php b/src/network/mcpe/auth/ProcessLoginTask.php
index c65203613..c19f67984 100644
--- a/src/network/mcpe/auth/ProcessLoginTask.php
+++ b/src/network/mcpe/auth/ProcessLoginTask.php
@@ -32,9 +32,9 @@ use pocketmine\network\mcpe\protocol\types\login\JwtChainLinkBody;
 use pocketmine\network\mcpe\protocol\types\login\JwtHeader;
 use pocketmine\scheduler\AsyncTask;
 use function base64_decode;
-use function serialize;
+use function igbinary_serialize;
+use function igbinary_unserialize;
 use function time;
-use function unserialize;
 
 class ProcessLoginTask extends AsyncTask{
 	private const TLS_KEY_ON_COMPLETION = "completion";
@@ -73,7 +73,7 @@ class ProcessLoginTask extends AsyncTask{
 	 */
 	public function __construct(array $chainJwts, string $clientDataJwt, bool $authRequired, \Closure $onCompletion){
 		$this->storeLocal(self::TLS_KEY_ON_COMPLETION, $onCompletion);
-		$this->chain = serialize($chainJwts);
+		$this->chain = igbinary_serialize($chainJwts);
 		$this->clientDataJwt = $clientDataJwt;
 		$this->authRequired = $authRequired;
 	}
@@ -89,7 +89,7 @@ class ProcessLoginTask extends AsyncTask{
 
 	private function validateChain() : PublicKeyInterface{
 		/** @var string[] $chain */
-		$chain = unserialize($this->chain);
+		$chain = igbinary_unserialize($this->chain);
 
 		$currentKey = null;
 		$first = true;
diff --git a/src/scheduler/AsyncTask.php b/src/scheduler/AsyncTask.php
index 29ff9a3bd..cd79e6f40 100644
--- a/src/scheduler/AsyncTask.php
+++ b/src/scheduler/AsyncTask.php
@@ -24,11 +24,11 @@ declare(strict_types=1);
 namespace pocketmine\scheduler;
 
 use pocketmine\utils\AssumptionFailedError;
+use function igbinary_serialize;
+use function igbinary_unserialize;
 use function is_scalar;
 use function is_string;
-use function serialize;
 use function spl_object_id;
-use function unserialize;
 
 /**
  * Class used to run async tasks in other threads.
@@ -109,7 +109,7 @@ abstract class AsyncTask extends \Threaded{
 	public function getResult(){
 		if($this->serialized){
 			if(!is_string($this->result)) throw new AssumptionFailedError("Result expected to be a serialized string");
-			return unserialize($this->result);
+			return igbinary_unserialize($this->result);
 		}
 		return $this->result;
 	}
@@ -130,7 +130,7 @@ abstract class AsyncTask extends \Threaded{
 	 * @param mixed $result
 	 */
 	public function setResult($result) : void{
-		$this->result = ($this->serialized = !is_scalar($result)) ? serialize($result) : $result;
+		$this->result = ($this->serialized = !is_scalar($result)) ? igbinary_serialize($result) : $result;
 	}
 
 	public function setSubmitted() : void{
@@ -161,7 +161,7 @@ abstract class AsyncTask extends \Threaded{
 	 * @param mixed $progress A value that can be safely serialize()'ed.
 	 */
 	public function publishProgress($progress) : void{
-		$this->progressUpdates[] = serialize($progress);
+		$this->progressUpdates[] = igbinary_serialize($progress);
 	}
 
 	/**
@@ -170,7 +170,7 @@ abstract class AsyncTask extends \Threaded{
 	public function checkProgressUpdates() : void{
 		while($this->progressUpdates->count() !== 0){
 			$progress = $this->progressUpdates->shift();
-			$this->onProgressUpdate(unserialize($progress));
+			$this->onProgressUpdate(igbinary_unserialize($progress));
 		}
 	}
 
diff --git a/src/scheduler/BulkCurlTask.php b/src/scheduler/BulkCurlTask.php
index 5dd534ebd..bd9a3b059 100644
--- a/src/scheduler/BulkCurlTask.php
+++ b/src/scheduler/BulkCurlTask.php
@@ -25,8 +25,8 @@ namespace pocketmine\scheduler;
 
 use pocketmine\utils\Internet;
 use pocketmine\utils\InternetException;
-use function serialize;
-use function unserialize;
+use function igbinary_serialize;
+use function igbinary_unserialize;
 
 /**
  * Executes a consecutive list of cURL operations.
@@ -48,12 +48,12 @@ class BulkCurlTask extends AsyncTask{
 	 * @phpstan-param list<array{page: string, timeout?: float, extraHeaders?: list<string>, extraOpts?: array<int, mixed>}> $operations
 	 */
 	public function __construct(array $operations){
-		$this->operations = serialize($operations);
+		$this->operations = igbinary_serialize($operations);
 	}
 
 	public function onRun() : void{
 		/** @phpstan-var list<array{page: string, timeout?: float, extraHeaders?: list<string>, extraOpts?: array<int, mixed>}> $operations */
-		$operations = unserialize($this->operations);
+		$operations = igbinary_unserialize($this->operations);
 		$results = [];
 		foreach($operations as $op){
 			try{
diff --git a/src/world/generator/GeneratorRegisterTask.php b/src/world/generator/GeneratorRegisterTask.php
index d00235120..25f4777d6 100644
--- a/src/world/generator/GeneratorRegisterTask.php
+++ b/src/world/generator/GeneratorRegisterTask.php
@@ -26,8 +26,8 @@ namespace pocketmine\world\generator;
 use pocketmine\scheduler\AsyncTask;
 use pocketmine\world\biome\Biome;
 use pocketmine\world\World;
-use function serialize;
-use function unserialize;
+use function igbinary_serialize;
+use function igbinary_unserialize;
 
 class GeneratorRegisterTask extends AsyncTask{
 
@@ -48,7 +48,7 @@ class GeneratorRegisterTask extends AsyncTask{
 	 */
 	public function __construct(World $world, string $generatorClass, array $generatorSettings = []){
 		$this->generatorClass = $generatorClass;
-		$this->settings = serialize($generatorSettings);
+		$this->settings = igbinary_serialize($generatorSettings);
 		$this->seed = $world->getSeed();
 		$this->worldId = $world->getId();
 		$this->worldHeight = $world->getWorldHeight();
@@ -63,7 +63,7 @@ class GeneratorRegisterTask extends AsyncTask{
 		 * @var Generator $generator
 		 * @see Generator::__construct()
 		 */
-		$generator = new $this->generatorClass($manager, $this->seed, unserialize($this->settings));
+		$generator = new $this->generatorClass($manager, $this->seed, igbinary_unserialize($this->settings));
 		$this->worker->saveToThreadStore("generation.world{$this->worldId}.generator", $generator);
 	}
 }