diff --git a/src/core/Constant.php b/src/core/Constant.php
index 8e2214f..7e1b3cc 100644
--- a/src/core/Constant.php
+++ b/src/core/Constant.php
@@ -125,6 +125,9 @@ class Constant
 
     public const OPTION_AIO_MAX_IDLE_TIME = 'aio_max_idle_time';
 
+    /**
+     * @since 6.0.0-beta
+     */
     public const OPTION_IOURING_ENTRIES = 'iouring_entries';
 
     /**
diff --git a/src/core/Thread/Pool.php b/src/core/Thread/Pool.php
index bb68e7b..ab0a83c 100644
--- a/src/core/Thread/Pool.php
+++ b/src/core/Thread/Pool.php
@@ -15,6 +15,9 @@
 use PhpParser\ParserFactory;
 use Swoole\Thread;
 
+/**
+ * @since 6.0.0-beta
+ */
 class Pool
 {
     private array $threads = [];
diff --git a/src/core/Thread/Runnable.php b/src/core/Thread/Runnable.php
index d40c9c3..0bec4ff 100644
--- a/src/core/Thread/Runnable.php
+++ b/src/core/Thread/Runnable.php
@@ -11,6 +11,9 @@
 
 namespace Swoole\Thread;
 
+/**
+ * @since 6.0.0-beta
+ */
 abstract class Runnable
 {
     protected Atomic $running;