diff --git a/src/block/tile/BrewingStand.php b/src/block/tile/BrewingStand.php
index 8977d36b1..f10c47f79 100644
--- a/src/block/tile/BrewingStand.php
+++ b/src/block/tile/BrewingStand.php
@@ -54,8 +54,8 @@ class BrewingStand extends Spawnable implements Container, Nameable{
 	public function __construct(World $world, Vector3 $pos){
 		parent::__construct($world, $pos);
 		$this->inventory = new BrewingStandInventory($this->pos);
-		$this->inventory->getListeners()->add(CallbackInventoryListener::onAnyChange(function(Inventory $unused) : void{
-			$this->pos->getWorld()->scheduleDelayedBlockUpdate($this->pos, 1);
+		$this->inventory->getListeners()->add(CallbackInventoryListener::onAnyChange(static function(Inventory $unused) use ($world, $pos) : void{
+			$world->scheduleDelayedBlockUpdate($pos, 1);
 		}));
 	}
 
diff --git a/src/block/tile/Furnace.php b/src/block/tile/Furnace.php
index bbe9b998b..5f31c8dfb 100644
--- a/src/block/tile/Furnace.php
+++ b/src/block/tile/Furnace.php
@@ -58,8 +58,8 @@ class Furnace extends Spawnable implements Container, Nameable{
 		parent::__construct($world, $pos);
 		$this->inventory = new FurnaceInventory($this->pos);
 		$this->inventory->getListeners()->add(CallbackInventoryListener::onAnyChange(
-			function(Inventory $unused) : void{
-				$this->pos->getWorld()->scheduleDelayedBlockUpdate($this->pos, 1);
+			static function(Inventory $unused) use ($world, $pos) : void{
+				$world->scheduleDelayedBlockUpdate($pos, 1);
 			})
 		);
 	}
diff --git a/src/crafting/CraftingManager.php b/src/crafting/CraftingManager.php
index 709480506..50e1cc89a 100644
--- a/src/crafting/CraftingManager.php
+++ b/src/crafting/CraftingManager.php
@@ -49,8 +49,10 @@ class CraftingManager{
 	public function __construct(){
 		$this->recipeRegisteredCallbacks = new ObjectSet();
 		$this->furnaceRecipeManager = new FurnaceRecipeManager();
-		$this->furnaceRecipeManager->getRecipeRegisteredCallbacks()->add(function(FurnaceRecipe $recipe) : void{
-			foreach($this->recipeRegisteredCallbacks as $callback){
+
+		$recipeRegisteredCallbacks = $this->recipeRegisteredCallbacks;
+		$this->furnaceRecipeManager->getRecipeRegisteredCallbacks()->add(static function(FurnaceRecipe $recipe) use ($recipeRegisteredCallbacks) : void{
+			foreach($recipeRegisteredCallbacks as $callback){
 				$callback();
 			}
 		});
diff --git a/src/world/World.php b/src/world/World.php
index a0e6ad6d9..081eb1cdb 100644
--- a/src/world/World.php
+++ b/src/world/World.php
@@ -447,8 +447,9 @@ class World implements ChunkManager{
 				unset($this->generatorRegisteredWorkers[$workerId]);
 			}
 		});
-		$this->addOnUnloadCallback(function() use ($workerStartHook) : void{
-			$this->workerPool->removeWorkerStartHook($workerStartHook);
+		$workerPool = $this->workerPool;
+		$this->addOnUnloadCallback(static function() use ($workerPool, $workerStartHook) : void{
+			$workerPool->removeWorkerStartHook($workerStartHook);
 		});
 	}