diff --git a/casic-metering-common/src/main/java/com/casic/missiles/listeners/flowable/ProcessUpdateStateListener.java b/casic-metering-common/src/main/java/com/casic/missiles/listeners/flowable/ProcessUpdateStateListener.java
index d8b8517..3769c86 100644
--- a/casic-metering-common/src/main/java/com/casic/missiles/listeners/flowable/ProcessUpdateStateListener.java
+++ b/casic-metering-common/src/main/java/com/casic/missiles/listeners/flowable/ProcessUpdateStateListener.java
@@ -23,6 +23,8 @@
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.Objects;
+
 @Slf4j
 @Component
 public class ProcessUpdateStateListener implements ExecutionListener {