diff --git a/src/RakLibToUserThreadMessageReceiver.php b/src/RakLibToUserThreadMessageReceiver.php
index 98a2f61..dc53f1e 100644
--- a/src/RakLibToUserThreadMessageReceiver.php
+++ b/src/RakLibToUserThreadMessageReceiver.php
@@ -25,8 +25,7 @@
 use function substr;
 
 final class RakLibToUserThreadMessageReceiver{
-	/** @var InterThreadChannelReader */
-	private $channel;
+	private InterThreadChannelReader $channel;
 
 	public function __construct(InterThreadChannelReader $channel){
 		$this->channel = $channel;
diff --git a/src/RakLibToUserThreadMessageSender.php b/src/RakLibToUserThreadMessageSender.php
index 24d1f6c..a7afee9 100644
--- a/src/RakLibToUserThreadMessageSender.php
+++ b/src/RakLibToUserThreadMessageSender.php
@@ -26,8 +26,7 @@
 
 final class RakLibToUserThreadMessageSender implements ServerEventListener{
 
-	/** @var InterThreadChannelWriter */
-	private $channel;
+	private InterThreadChannelWriter $channel;
 
 	public function __construct(InterThreadChannelWriter $channel){
 		$this->channel = $channel;
diff --git a/src/UserToRakLibThreadMessageReceiver.php b/src/UserToRakLibThreadMessageReceiver.php
index 64b6bbf..1dde5ce 100644
--- a/src/UserToRakLibThreadMessageReceiver.php
+++ b/src/UserToRakLibThreadMessageReceiver.php
@@ -27,8 +27,7 @@
 use function substr;
 
 final class UserToRakLibThreadMessageReceiver implements ServerEventSource{
-	/** @var InterThreadChannelReader */
-	private $channel;
+	private InterThreadChannelReader $channel;
 
 	public function __construct(InterThreadChannelReader $channel){
 		$this->channel = $channel;
diff --git a/src/UserToRakLibThreadMessageSender.php b/src/UserToRakLibThreadMessageSender.php
index ed331c5..ffa89e1 100644
--- a/src/UserToRakLibThreadMessageSender.php
+++ b/src/UserToRakLibThreadMessageSender.php
@@ -26,8 +26,7 @@
 use function strlen;
 
 class UserToRakLibThreadMessageSender implements ServerInterface{
-	/** @var InterThreadChannelWriter */
-	private $channel;
+	private InterThreadChannelWriter $channel;
 
 	public function __construct(InterThreadChannelWriter $channel){
 		$this->channel = $channel;