diff --git a/threadpool/core/src/main/java/cn/hippo4j/core/executor/plugin/impl/TaskRejectNotifyAlarmPlugin.java b/threadpool/core/src/main/java/cn/hippo4j/core/executor/plugin/impl/TaskRejectNotifyAlarmPlugin.java
index 74801a86..9c29252c 100644
--- a/threadpool/core/src/main/java/cn/hippo4j/core/executor/plugin/impl/TaskRejectNotifyAlarmPlugin.java
+++ b/threadpool/core/src/main/java/cn/hippo4j/core/executor/plugin/impl/TaskRejectNotifyAlarmPlugin.java
@@ -38,7 +38,6 @@ public class TaskRejectNotifyAlarmPlugin implements RejectedAwarePlugin {
     /**
      * Thread pool check alarm
      */
-    @NonNull
     private final ThreadPoolCheckAlarm threadPoolCheckAlarm;
 
     /**