diff --git a/src/command/Command.php b/src/command/Command.php
index 6b1d6ab33..51e3ef51c 100644
--- a/src/command/Command.php
+++ b/src/command/Command.php
@@ -40,23 +40,18 @@ use function str_replace;
 
 abstract class Command{
 
-	/** @var string */
-	private $name;
+	private string $name;
 
-	/** @var string */
-	private $nextLabel;
-
-	/** @var string */
-	private $label;
+	private string $nextLabel;
+	private string $label;
 
 	/** @var string[] */
-	private $aliases = [];
+	private array $aliases = [];
 
 	/** @var string[] */
-	private $activeAliases = [];
+	private array $activeAliases = [];
 
-	/** @var CommandMap|null */
-	private $commandMap = null;
+	private ?CommandMap $commandMap = null;
 
 	/** @var Translatable|string */
 	protected $description = "";
@@ -64,11 +59,8 @@ abstract class Command{
 	/** @var Translatable|string */
 	protected $usageMessage;
 
-	/** @var string|null */
-	private $permission = null;
-
-	/** @var string|null */
-	private $permissionMessage = null;
+	private ?string $permission = null;
+	private ?string $permissionMessage = null;
 
 	/** @var TimingsHandler|null */
 	public $timings = null;
diff --git a/src/command/FormattedCommandAlias.php b/src/command/FormattedCommandAlias.php
index 968c10012..ca8908897 100644
--- a/src/command/FormattedCommandAlias.php
+++ b/src/command/FormattedCommandAlias.php
@@ -33,7 +33,7 @@ use function substr;
 
 class FormattedCommandAlias extends Command{
 	/** @var string[] */
-	private $formatStrings = [];
+	private array $formatStrings = [];
 
 	/**
 	 * @param string[] $formatStrings
diff --git a/src/command/PluginCommand.php b/src/command/PluginCommand.php
index 634978006..73e27a0f8 100644
--- a/src/command/PluginCommand.php
+++ b/src/command/PluginCommand.php
@@ -31,8 +31,7 @@ use pocketmine\plugin\PluginOwnedTrait;
 final class PluginCommand extends Command implements PluginOwned{
 	use PluginOwnedTrait;
 
-	/** @var CommandExecutor */
-	private $executor;
+	private CommandExecutor $executor;
 
 	public function __construct(string $name, Plugin $owner, CommandExecutor $executor){
 		parent::__construct($name);
diff --git a/src/command/SimpleCommandMap.php b/src/command/SimpleCommandMap.php
index 116f59c23..13d27c06f 100644
--- a/src/command/SimpleCommandMap.php
+++ b/src/command/SimpleCommandMap.php
@@ -84,11 +84,7 @@ class SimpleCommandMap implements CommandMap{
 	/** @var Command[] */
 	protected $knownCommands = [];
 
-	/** @var Server */
-	private $server;
-
-	public function __construct(Server $server){
-		$this->server = $server;
+	public function __construct(private Server $server){
 		$this->setDefaultCommands();
 	}