diff --git a/System/Crontab/Crontab.php b/System/Crontab/Crontab.php
index 0b3d28a4..b9727e27 100644
--- a/System/Crontab/Crontab.php
+++ b/System/Crontab/Crontab.php
@@ -236,9 +236,9 @@ abstract class Crontab extends BaseObject
 	}
 
 
-	abstract public function process(): void;
+	abstract public function process(): mixed;
 
-	abstract public function max_execute(): void;
+	abstract public function max_execute(): mixed;
 	abstract public function isStop(): bool;
 
 
diff --git a/System/Crontab/DefaultCrontab.php b/System/Crontab/DefaultCrontab.php
index 67a196e1..577a038a 100644
--- a/System/Crontab/DefaultCrontab.php
+++ b/System/Crontab/DefaultCrontab.php
@@ -24,14 +24,14 @@ class DefaultCrontab extends Crontab
 	/**
 	 *
 	 */
-	public function process(): void
+	public function process(): mixed
 	{
 		// TODO: Implement process() method.
 	}
 
 
 
-	public function max_execute(): void
+	public function max_execute(): mixed
 	{
 		// TODO: Implement max_execute() method.
 	}