diff --git a/src/pocketmine/block/BlockFactory.php b/src/pocketmine/block/BlockFactory.php
index ac89d3d9f..68f42ea11 100644
--- a/src/pocketmine/block/BlockFactory.php
+++ b/src/pocketmine/block/BlockFactory.php
@@ -391,6 +391,7 @@ class BlockFactory{
 
 	/**
 	 * @internal
+	 * @phpstan-return \SplFixedArray<Block>
 	 */
 	public static function getBlockStatesArray() : \SplFixedArray{
 		return self::$fullList;
diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index f33a58430..71d6f258c 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -46,7 +46,10 @@ abstract class BaseInventory implements Inventory{
 	protected $name;
 	/** @var string */
 	protected $title;
-	/** @var \SplFixedArray|(Item|null)[] */
+	/**
+	 * @var \SplFixedArray|(Item|null)[]
+	 * @phpstan-var \SplFixedArray<Item|null>
+	 */
 	protected $slots;
 	/** @var Player[] */
 	protected $viewers = [];
diff --git a/src/pocketmine/item/ItemFactory.php b/src/pocketmine/item/ItemFactory.php
index 7a22570ab..ed9e969d4 100644
--- a/src/pocketmine/item/ItemFactory.php
+++ b/src/pocketmine/item/ItemFactory.php
@@ -43,7 +43,10 @@ use function trim;
  */
 class ItemFactory{
 
-	/** @var \SplFixedArray */
+	/**
+	 * @var \SplFixedArray
+	 * @phpstan-var \SplFixedArray<Item>
+	 */
 	private static $list = null;
 
 	/**
diff --git a/src/pocketmine/item/enchantment/Enchantment.php b/src/pocketmine/item/enchantment/Enchantment.php
index 56ce04d2d..4ba5e5d32 100644
--- a/src/pocketmine/item/enchantment/Enchantment.php
+++ b/src/pocketmine/item/enchantment/Enchantment.php
@@ -94,7 +94,10 @@ class Enchantment{
 	public const SLOT_ELYTRA = 0x4000;
 	public const SLOT_TRIDENT = 0x8000;
 
-	/** @var \SplFixedArray|Enchantment[] */
+	/**
+	 * @var \SplFixedArray|Enchantment[]
+	 * @phpstan-var \SplFixedArray<Enchantment>
+	 */
 	protected static $enchantments;
 
 	public static function init() : void{
diff --git a/src/pocketmine/item/enchantment/EnchantmentList.php b/src/pocketmine/item/enchantment/EnchantmentList.php
index 617ca13af..103d3c1a6 100644
--- a/src/pocketmine/item/enchantment/EnchantmentList.php
+++ b/src/pocketmine/item/enchantment/EnchantmentList.php
@@ -25,7 +25,10 @@ namespace pocketmine\item\enchantment;
 
 class EnchantmentList{
 
-	/** @var \SplFixedArray|EnchantmentEntry[] */
+	/**
+	 * @var \SplFixedArray|EnchantmentEntry[]
+	 * @phpstan-var \SplFixedArray<EnchantmentEntry>
+	 */
 	private $enchantments;
 
 	public function __construct(int $size){
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 31552943c..87d65c776 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -247,7 +247,10 @@ class Level implements ChunkManager, Metadatable{
 	/** @var Vector3 */
 	private $temporalVector;
 
-	/** @var \SplFixedArray */
+	/**
+	 * @var \SplFixedArray
+	 * @phpstan-var \SplFixedArray<Block>
+	 */
 	private $blockStates;
 
 	/** @var int */
@@ -1038,6 +1041,9 @@ class Level implements ChunkManager, Metadatable{
 		unset($this->chunkCache[Level::chunkHash($chunkX, $chunkZ)]);
 	}
 
+	/**
+	 * @phpstan-return \SplFixedArray<Block>
+	 */
 	public function getRandomTickedBlocks() : \SplFixedArray{
 		return $this->randomTickBlocks;
 	}
diff --git a/src/pocketmine/level/biome/Biome.php b/src/pocketmine/level/biome/Biome.php
index c70acf460..9a92c5548 100644
--- a/src/pocketmine/level/biome/Biome.php
+++ b/src/pocketmine/level/biome/Biome.php
@@ -49,7 +49,10 @@ abstract class Biome{
 
 	public const MAX_BIOMES = 256;
 
-	/** @var Biome[]|\SplFixedArray */
+	/**
+	 * @var Biome[]|\SplFixedArray
+	 * @phpstan-var \SplFixedArray<Biome>
+	 */
 	private static $biomes;
 
 	/** @var int */
diff --git a/src/pocketmine/level/format/Chunk.php b/src/pocketmine/level/format/Chunk.php
index 39ce3d2b9..430dee8db 100644
--- a/src/pocketmine/level/format/Chunk.php
+++ b/src/pocketmine/level/format/Chunk.php
@@ -72,7 +72,10 @@ class Chunk{
 	/** @var int */
 	protected $height = Chunk::MAX_SUBCHUNKS;
 
-	/** @var \SplFixedArray|SubChunkInterface[] */
+	/**
+	 * @var \SplFixedArray|SubChunkInterface[]
+	 * @phpstan-var \SplFixedArray<SubChunkInterface>
+	 */
 	protected $subChunks;
 
 	/** @var EmptySubChunk */
@@ -86,7 +89,10 @@ class Chunk{
 	/** @var Entity[] */
 	protected $entities = [];
 
-	/** @var \SplFixedArray|int[] */
+	/**
+	 * @var \SplFixedArray|int[]
+	 * @phpstan-var \SplFixedArray<int>
+	 */
 	protected $heightMap;
 
 	/** @var string */
@@ -784,6 +790,7 @@ class Chunk{
 
 	/**
 	 * @return \SplFixedArray|SubChunkInterface[]
+	 * @phpstan-return \SplFixedArray<SubChunkInterface>
 	 */
 	public function getSubChunks() : \SplFixedArray{
 		return $this->subChunks;
diff --git a/src/pocketmine/level/generator/biome/BiomeSelector.php b/src/pocketmine/level/generator/biome/BiomeSelector.php
index 0d275acb7..4688e9e88 100644
--- a/src/pocketmine/level/generator/biome/BiomeSelector.php
+++ b/src/pocketmine/level/generator/biome/BiomeSelector.php
@@ -34,7 +34,10 @@ abstract class BiomeSelector{
 	/** @var Simplex */
 	private $rainfall;
 
-	/** @var Biome[]|\SplFixedArray */
+	/**
+	 * @var Biome[]|\SplFixedArray
+	 * @phpstan-var \SplFixedArray<Biome>
+	 */
 	private $map = null;
 
 	public function __construct(Random $random){
diff --git a/src/pocketmine/level/generator/noise/Noise.php b/src/pocketmine/level/generator/noise/Noise.php
index 46203982b..727dd8299 100644
--- a/src/pocketmine/level/generator/noise/Noise.php
+++ b/src/pocketmine/level/generator/noise/Noise.php
@@ -247,6 +247,10 @@ abstract class Noise{
 		return $result;
 	}
 
+	/**
+	 * @return \SplFixedArray|float[]
+	 * @phpstan-return \SplFixedArray<float>
+	 */
 	public function getFastNoise1D(int $xSize, int $samplingRate, int $x, int $y, int $z) : \SplFixedArray{
 		if($samplingRate === 0){
 			throw new \InvalidArgumentException("samplingRate cannot be 0");
@@ -271,6 +275,10 @@ abstract class Noise{
 		return $noiseArray;
 	}
 
+	/**
+	 * @return \SplFixedArray|float[][]
+	 * @phpstan-return \SplFixedArray<\SplFixedArray<float>>
+	 */
 	public function getFastNoise2D(int $xSize, int $zSize, int $samplingRate, int $x, int $y, int $z) : \SplFixedArray{
 		assert($samplingRate !== 0, new \InvalidArgumentException("samplingRate cannot be 0"));