diff --git a/src/block/DragonEgg.php b/src/block/DragonEgg.php
index 17546b3f2..5ea065759 100644
--- a/src/block/DragonEgg.php
+++ b/src/block/DragonEgg.php
@@ -65,7 +65,7 @@ class DragonEgg extends Transparent implements Fallable{
 		for($tries = 0; $tries < 16; ++$tries){
 			$block = $this->pos->getWorld()->getBlockAt(
 				$this->pos->x + mt_rand(-16, 16),
-				max(0, min(World::Y_MAX - 1, $this->pos->y + mt_rand(-8, 8))),
+				max(World::Y_MIN, min(World::Y_MAX - 1, $this->pos->y + mt_rand(-8, 8))),
 				$this->pos->z + mt_rand(-16, 16)
 			);
 			if($block instanceof Air){
diff --git a/src/command/defaults/ParticleCommand.php b/src/command/defaults/ParticleCommand.php
index 0296b148b..1420f5d3c 100644
--- a/src/command/defaults/ParticleCommand.php
+++ b/src/command/defaults/ParticleCommand.php
@@ -97,7 +97,7 @@ class ParticleCommand extends VanillaCommand{
 			$world = $senderPos->getWorld();
 			$pos = new Vector3(
 				$this->getRelativeDouble($senderPos->getX(), $sender, $args[1]),
-				$this->getRelativeDouble($senderPos->getY(), $sender, $args[2], 0, World::Y_MAX),
+				$this->getRelativeDouble($senderPos->getY(), $sender, $args[2], World::Y_MIN, World::Y_MAX),
 				$this->getRelativeDouble($senderPos->getZ(), $sender, $args[3])
 			);
 		}else{
diff --git a/src/command/defaults/SpawnpointCommand.php b/src/command/defaults/SpawnpointCommand.php
index 3fe453844..3c5cf4f0c 100644
--- a/src/command/defaults/SpawnpointCommand.php
+++ b/src/command/defaults/SpawnpointCommand.php
@@ -73,7 +73,7 @@ class SpawnpointCommand extends VanillaCommand{
 			$world = $target->getWorld();
 			$pos = $sender instanceof Player ? $sender->getPosition() : $world->getSpawnLocation();
 			$x = $this->getRelativeDouble($pos->x, $sender, $args[1]);
-			$y = $this->getRelativeDouble($pos->y, $sender, $args[2], 0, World::Y_MAX);
+			$y = $this->getRelativeDouble($pos->y, $sender, $args[2], World::Y_MIN, World::Y_MAX);
 			$z = $this->getRelativeDouble($pos->z, $sender, $args[3]);
 			$target->setSpawn(new Position($x, $y, $z, $world));
 
diff --git a/src/world/World.php b/src/world/World.php
index 51cd90ed9..2fadf68cb 100644
--- a/src/world/World.php
+++ b/src/world/World.php
@@ -124,9 +124,8 @@ class World implements ChunkManager{
 	private static $worldIdCounter = 1;
 
 	public const Y_MASK = 0xFF;
-	public const Y_MAX = 0x100; //256
-
-	public const HALF_Y_MAX = self::Y_MAX / 2;
+	public const Y_MAX = 320;
+	public const Y_MIN = -64;
 
 	public const TIME_DAY = 1000;
 	public const TIME_NOON = 6000;
@@ -296,6 +295,8 @@ class World implements ChunkManager{
 
 	private const MORTON3D_BIT_SIZE = 21;
 	private const BLOCKHASH_Y_BITS = 9;
+	private const BLOCKHASH_Y_PADDING = 128; //size (in blocks) of padding after both boundaries of the Y axis
+	private const BLOCKHASH_Y_OFFSET = self::BLOCKHASH_Y_PADDING - self::Y_MIN;
 	private const BLOCKHASH_Y_MASK = (1 << self::BLOCKHASH_Y_BITS) - 1;
 	private const BLOCKHASH_XZ_MASK = (1 << self::MORTON3D_BIT_SIZE) - 1;
 	private const BLOCKHASH_XZ_EXTRA_BITS = 6;
@@ -305,7 +306,7 @@ class World implements ChunkManager{
 	private const BLOCKHASH_Z_SHIFT = self::BLOCKHASH_X_SHIFT + self::BLOCKHASH_XZ_EXTRA_BITS;
 
 	public static function blockHash(int $x, int $y, int $z) : int{
-		$shiftedY = $y + self::HALF_Y_MAX;
+		$shiftedY = $y + self::BLOCKHASH_Y_OFFSET;
 		if(($shiftedY & (~0 << self::BLOCKHASH_Y_BITS)) !== 0){
 			throw new \InvalidArgumentException("Y coordinate $y is out of range!");
 		}
@@ -335,7 +336,7 @@ class World implements ChunkManager{
 		$extraZ = ((($baseY >> self::BLOCKHASH_Z_SHIFT) & self::BLOCKHASH_XZ_EXTRA_MASK) << self::MORTON3D_BIT_SIZE);
 
 		$x = (($baseX & self::BLOCKHASH_XZ_MASK) | $extraX) << self::BLOCKHASH_XZ_SIGN_SHIFT >> self::BLOCKHASH_XZ_SIGN_SHIFT;
-		$y = ($baseY & self::BLOCKHASH_Y_MASK) - self::HALF_Y_MAX;
+		$y = ($baseY & self::BLOCKHASH_Y_MASK) - self::BLOCKHASH_Y_OFFSET;
 		$z = (($baseZ & self::BLOCKHASH_XZ_MASK) | $extraZ) << self::BLOCKHASH_XZ_SIGN_SHIFT >> self::BLOCKHASH_XZ_SIGN_SHIFT;
 	}