diff --git a/src/pocketmine/item/enchantment/Enchantment.php b/src/pocketmine/item/enchantment/Enchantment.php
index 71416adee..21bf69e5a 100644
--- a/src/pocketmine/item/enchantment/Enchantment.php
+++ b/src/pocketmine/item/enchantment/Enchantment.php
@@ -93,7 +93,7 @@ class Enchantment{
 	/** @var Enchantment[] */
 	protected static $enchantments;
 
-	public static function init(){
+	public static function init() : void{
 		self::$enchantments = new \SplFixedArray(256);
 
 		self::registerEnchantment(new ProtectionEnchantment(self::PROTECTION, "%enchantment.protect.all", self::RARITY_COMMON, self::SLOT_ARMOR, self::SLOT_NONE, 4, 0.75, null));
@@ -137,7 +137,7 @@ class Enchantment{
 	 *
 	 * @return Enchantment|null
 	 */
-	public static function getEnchantment(int $id){
+	public static function getEnchantment(int $id) : ?Enchantment{
 		return self::$enchantments[$id] ?? null;
 	}
 
@@ -146,7 +146,7 @@ class Enchantment{
 	 *
 	 * @return Enchantment|null
 	 */
-	public static function getEnchantmentByName(string $name){
+	public static function getEnchantmentByName(string $name) : ?Enchantment{
 		$const = Enchantment::class . "::" . strtoupper($name);
 		if(defined($const)){
 			return self::getEnchantment(constant($const));
diff --git a/src/pocketmine/item/enchantment/EnchantmentEntry.php b/src/pocketmine/item/enchantment/EnchantmentEntry.php
index b1812859e..286061c20 100644
--- a/src/pocketmine/item/enchantment/EnchantmentEntry.php
+++ b/src/pocketmine/item/enchantment/EnchantmentEntry.php
@@ -28,29 +28,31 @@ class EnchantmentEntry{
 
 	/** @var Enchantment[] */
 	private $enchantments;
+	/** @var int */
 	private $cost;
+	/** @var string */
 	private $randomName;
 
 	/**
 	 * @param Enchantment[] $enchantments
-	 * @param number        $cost
+	 * @param int           $cost
 	 * @param string        $randomName
 	 */
-	public function __construct(array $enchantments, $cost, $randomName){
+	public function __construct(array $enchantments, int $cost, string $randomName){
 		$this->enchantments = $enchantments;
-		$this->cost = (int) $cost;
+		$this->cost = $cost;
 		$this->randomName = $randomName;
 	}
 
-	public function getEnchantments(){
+	public function getEnchantments() : array{
 		return $this->enchantments;
 	}
 
-	public function getCost(){
+	public function getCost() : int{
 		return $this->cost;
 	}
 
-	public function getRandomName(){
+	public function getRandomName() : string{
 		return $this->randomName;
 	}
 
diff --git a/src/pocketmine/item/enchantment/EnchantmentList.php b/src/pocketmine/item/enchantment/EnchantmentList.php
index e89510f3e..c95b97374 100644
--- a/src/pocketmine/item/enchantment/EnchantmentList.php
+++ b/src/pocketmine/item/enchantment/EnchantmentList.php
@@ -26,30 +26,31 @@ namespace pocketmine\item\enchantment;
 
 class EnchantmentList{
 
-	/** @var EnchantmentEntry[] */
+	/** @var \SplFixedArray|EnchantmentEntry[] */
 	private $enchantments;
 
-	public function __construct($size){
+	public function __construct(int $size){
 		$this->enchantments = new \SplFixedArray($size);
 	}
 
 	/**
-	 * @param                  $slot
+	 * @param int              $slot
 	 * @param EnchantmentEntry $entry
 	 */
-	public function setSlot($slot, EnchantmentEntry $entry){
+	public function setSlot(int $slot, EnchantmentEntry $entry) : void{
 		$this->enchantments[$slot] = $entry;
 	}
 
 	/**
-	 * @param $slot
+	 * @param int $slot
+	 *
 	 * @return EnchantmentEntry
 	 */
-	public function getSlot($slot){
+	public function getSlot(int $slot) : EnchantmentEntry{
 		return $this->enchantments[$slot];
 	}
 
-	public function getSize(){
+	public function getSize() : int{
 		return $this->enchantments->getSize();
 	}