diff --git a/scripts/Event/Item/EventItem.gd b/scripts/Event/Item/EventItem.gd
index 92ad396..5389201 100644
--- a/scripts/Event/Item/EventItem.gd
+++ b/scripts/Event/Item/EventItem.gd
@@ -1,7 +1,7 @@
 class_name EventItem extends Event
 const Inventory = preload("res://scripts/Item/Inventory.gd")
 
-@export var itemType:Item.ItemType = Item.ItemType.POTION
+@export var itemType:Item.Type = Item.Type.POTION
 @export var quantity:int = 1
 var inventory:Inventory = null
 
diff --git a/scripts/Item/Inventory.gd b/scripts/Item/Inventory.gd
index 811fec5..9cf8d99 100644
--- a/scripts/Item/Inventory.gd
+++ b/scripts/Item/Inventory.gd
@@ -19,11 +19,15 @@ const ITEM_STACK_SIZE_MAX = 99;
 
 var contents:Array[ItemStack] = [];
 
-func addItem(item:Item.ItemType, quantity: int = 1) -> void:
+func isPlayerInventory() -> bool:
+	return self == ITEM.PLAYER_INVENTORY
+
+func addItem(item:Item.Type, quantity: int = 1) -> void:
 	if !Item.isStackable(item):
 		# Item cannot be stacked, add each item to inv
 		for i in range(quantity):
 			contents.append(ItemStack.new(item, 1))
+		_contentsUpdated()
 		return
 		
 	# Check for existing stacks
@@ -35,6 +39,7 @@ func addItem(item:Item.ItemType, quantity: int = 1) -> void:
 		
 		if quantity <= spaceAvailable:
 			stack.quantity += quantity;
+			_contentsUpdated()
 			return
 			
 		stack.quantity = ITEM_STACK_SIZE_MAX;
@@ -45,8 +50,9 @@ func addItem(item:Item.ItemType, quantity: int = 1) -> void:
 		var newStackQuantity = min(quantity, ITEM_STACK_SIZE_MAX);
 		contents.append(ItemStack.new(item, newStackQuantity));
 		quantity -= newStackQuantity;
+	_contentsUpdated()
 
-func removeItem(item:Item.ItemType, quantity:int) -> void:
+func removeItem(item:Item.Type, quantity:int) -> void:
 	var totalQuantity = 0
 	
 	# Calculate total quantity of the item in the inventory
@@ -73,12 +79,13 @@ func removeItem(item:Item.ItemType, quantity:int) -> void:
 			contents.erase(stack)
 
 		if quantity == 0:
+			self._contentsUpdated()
 			return
 
 func removeStack(stack: ItemStack) -> void:
 	self.removeItem(stack.item, stack.quantity);
 
-func hasItem(item:Item.ItemType, quantity: int = 1) -> bool:
+func hasItem(item:Item.Type, quantity: int = 1) -> bool:
 	var totalQuantity = 0
 	
 	for stack in contents:
@@ -99,4 +106,8 @@ func sortBy(by:ItemSortType) -> void:
 		ItemSortType.TYPE:
 			contents.sort_custom(ItemStackTypeComparator._sort)
 		_:
-			assert(false, "Invalid sort type: %s" % by)
\ No newline at end of file
+			assert(false, "Invalid sort type: %s" % by)
+
+func _contentsUpdated() -> void:
+	if isPlayerInventory():
+		QUEST.playerInventoryUpdated.emit()
diff --git a/scripts/Item/Item.gd b/scripts/Item/Item.gd
index 05ce220..65fdac6 100644
--- a/scripts/Item/Item.gd
+++ b/scripts/Item/Item.gd
@@ -1,17 +1,17 @@
 class_name Item
 
-enum ItemType {
+enum Type {
 	POTION,
 	ONION
 };
 	
-enum ItemCategory {
+enum Category {
 	MEDICINE,
 	KEY_ITEM,
 	INGREDIENT
 };
 
-static func isStackable(itemType:ItemType) -> bool:
+static func isStackable(itemType:Type) -> bool:
 	match itemType:
 		_:
 			return true
diff --git a/scripts/Item/ItemStack.gd b/scripts/Item/ItemStack.gd
index 8837123..bfad7ad 100644
--- a/scripts/Item/ItemStack.gd
+++ b/scripts/Item/ItemStack.gd
@@ -1,8 +1,8 @@
 class_name ItemStack
 
-var item:Item.ItemType;
+var item:Item.Type;
 var quantity:int;
 
-func _init(item:Item.ItemType, quantity:int = 1):
+func _init(item:Item.Type, quantity:int = 1):
 	self.item = item;
 	self.quantity = quantity;
diff --git a/scripts/Quest/Quest.gd b/scripts/Quest/Quest.gd
index c58b17a..63e64f0 100644
--- a/scripts/Quest/Quest.gd
+++ b/scripts/Quest/Quest.gd
@@ -26,3 +26,6 @@ func isCompleted() -> bool:
 
 func isStarted() -> bool:
 	return questStarted
+
+func objectiveUpdated(objective:QuestObjective) -> void:
+	QUEST.questUpdated.emit(self)
\ No newline at end of file
diff --git a/scripts/Quest/QuestObjective.gd b/scripts/Quest/QuestObjective.gd
index 0efbec2..518380c 100644
--- a/scripts/Quest/QuestObjective.gd
+++ b/scripts/Quest/QuestObjective.gd
@@ -7,7 +7,34 @@ enum Type {
 @export var objectiveName:String = "Some objective"
 @export var objectiveType:Type = Type.Item
 
-var quest:Quest
+@export var itemType:Item.Type = Item.Type.POTION
+@export var quantity:int = 1
 
-func onQuestReady(quest:Quest) -> void:
-	self.quest = quest
\ No newline at end of file
+var completed:bool = false
+var quest:Quest = null
+
+func onQuestReady(_quest:Quest) -> void:
+	self.quest = _quest
+	if objectiveType == Type.Item:
+		QUEST.playerInventoryUpdated.connect(_onPlayerInventoryUpdated)
+		_onPlayerInventoryUpdated()
+
+func _exit_tree() -> void:
+	QUEST.playerInventoryUpdated.disconnect(_onPlayerInventoryUpdated)
+
+func _onPlayerInventoryUpdated() -> void:
+	if !quest.isStarted():
+		return
+
+	# Ensure player has the item
+	var hasItem = ITEM.PLAYER_INVENTORY.hasItem(itemType, quantity)
+
+	if hasItem && !completed:
+		self.completed = true
+		quest.objectiveUpdated(self)
+	else:
+		self.completed = false
+		quest.objectiveUpdated(self)
+
+func isCompleted() -> bool:
+	return completed
\ No newline at end of file
diff --git a/scripts/Singleton/Item.gd b/scripts/Singleton/Item.gd
index 77f7635..badc24b 100644
--- a/scripts/Singleton/Item.gd
+++ b/scripts/Singleton/Item.gd
@@ -5,10 +5,5 @@ const Inventory = preload("res://scripts/Item/Inventory.gd")
 # static var POTION = preload("res://scripts/Item/Potion.gd").new();
 # static var ONION = preload("res://scripts/Item/Ingredient/Onion.gd").new();
 
-enum ItemType {
-	POTION,
-	ONION
-};
-
 # Static inventories
 static var PLAYER_INVENTORY = Inventory.new();
diff --git a/scripts/Singleton/Quest.gd b/scripts/Singleton/Quest.gd
index 5656045..84bd08f 100644
--- a/scripts/Singleton/Quest.gd
+++ b/scripts/Singleton/Quest.gd
@@ -9,6 +9,7 @@ var quests:Dictionary[int, Quest]
 signal questStarted(quest:Quest)
 signal questUpdated(quest:Quest)
 signal questCompleted(quest:Quest)
+signal playerInventoryUpdated()
 # signal questObjectiveCompleted(quest:Quest, objective:QuestObjective)
 
 func _ready() -> void:
@@ -23,4 +24,4 @@ func _updateQuests() -> void:
 			quests[quest.questKey] = quest
 
 	for quest in QuestKey:
-		assert(quests.has(QuestKey[quest]), "Quest with key %s does not exist" % quest)
+		assert(quests.has(QuestKey[quest]), "Quest with key %s does not exist" % quest)
\ No newline at end of file