diff --git a/System/Crontab/CrontabProviders.php b/System/Crontab/CrontabProviders.php
index c319c647..d6ad4eb3 100644
--- a/System/Crontab/CrontabProviders.php
+++ b/System/Crontab/CrontabProviders.php
@@ -4,9 +4,14 @@
 namespace Snowflake\Crontab;
 
 
+use Exception;
+use ReflectionException;
 use Snowflake\Abstracts\Config;
 use Snowflake\Abstracts\Providers;
 use Snowflake\Application;
+use Snowflake\Exception\ComponentException;
+use Snowflake\Exception\ConfigException;
+use Snowflake\Exception\NotFindClassException;
 
 
 /**
@@ -17,9 +22,14 @@ class CrontabProviders extends Providers
 {
 
 
-    /**
-     * @param Application $application
-     */
+	/**
+	 * @param Application $application
+	 * @throws ReflectionException
+	 * @throws ComponentException
+	 * @throws ConfigException
+	 * @throws NotFindClassException
+	 * @throws Exception
+	 */
     public function onImport(Application $application)
     {
         $server = $application->getServer();
diff --git a/System/Crontab/Producer.php b/System/Crontab/Producer.php
index 5f0f1c1c..567d4748 100644
--- a/System/Crontab/Producer.php
+++ b/System/Crontab/Producer.php
@@ -19,11 +19,10 @@ class Producer extends Component
     const CRONTAB_KEY = 'system:crontab';
 
 
-    /**
-     * @param Crontab $crontab
-     * @param $executeTime
-     * @throws Exception
-     */
+	/**
+	 * @param Crontab $crontab
+	 * @throws Exception
+	 */
     public function dispatch(Crontab $crontab)
     {
         $redis = Snowflake::app()->getRedis();