diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index ab833b6ee..e4da37872 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -45,7 +45,6 @@ use pocketmine\nbt\tag\StringTag;
 use pocketmine\nbt\TreeRoot;
 use pocketmine\player\Player;
 use pocketmine\utils\Binary;
-use function array_map;
 use function base64_decode;
 use function base64_encode;
 use function get_class;
@@ -848,6 +847,5 @@ class Item implements ItemIds, \JsonSerializable{
 		}
 		$this->canPlaceOn = $this->canPlaceOn->copy();
 		$this->canDestroy = $this->canDestroy->copy();
-		$this->enchantments = array_map(function(EnchantmentInstance $i){ return clone $i; }, $this->enchantments);
 	}
 }
diff --git a/src/pocketmine/item/enchantment/EnchantmentInstance.php b/src/pocketmine/item/enchantment/EnchantmentInstance.php
index 2434ba5b8..4dadc77c1 100644
--- a/src/pocketmine/item/enchantment/EnchantmentInstance.php
+++ b/src/pocketmine/item/enchantment/EnchantmentInstance.php
@@ -25,8 +25,10 @@ namespace pocketmine\item\enchantment;
 
 /**
  * Container for enchantment data applied to items.
+ *
+ * Note: This class is assumed to be immutable. Consider this before making alterations.
  */
-class EnchantmentInstance{
+final class EnchantmentInstance{
 	/** @var Enchantment */
 	private $enchantment;
 	/** @var int */
@@ -66,17 +68,4 @@ class EnchantmentInstance{
 	public function getLevel() : int{
 		return $this->level;
 	}
-
-	/**
-	 * Sets the level of the enchantment.
-	 *
-	 * @param int $level
-	 *
-	 * @return $this
-	 */
-	public function setLevel(int $level){
-		$this->level = $level;
-
-		return $this;
-	}
 }