diff --git a/src/entities/components/inventory.gd b/src/entities/components/inventory.gd
index 0101c43..62d182d 100644
--- a/src/entities/components/inventory.gd
+++ b/src/entities/components/inventory.gd
@@ -31,7 +31,7 @@ func _ready() -> void:
 	if not owner.inventory:
 		owner.inventory = self
 
-func _unhandled_input(event):
+func _unhandled_input(event : InputEvent) -> void:
 	if event is InputEventMouseButton:
 		# @NOTE: there could be a control setting for direction
 		if event.button_index == MOUSE_BUTTON_WHEEL_UP and event.pressed:
@@ -40,7 +40,7 @@ func _unhandled_input(event):
 			roll(-1)
 
 ## This method overrides [method Node.add_child] method to make sure not to exceed the inventory capacity
-func _add_child(node: Node, force_readable_name: bool = false, internal: InternalMode = 0) -> void:
+func _add_child(node: Node, force_readable_name: bool = false, internal: InternalMode = InternalMode.INTERNAL_MODE_DISABLED) -> void:
 	if get_child_count() <= capacity:
 		super.add_child(node, force_readable_name, internal)