diff --git a/modules/i3plus-pojo-mes-pcn/src/main/java/cn/estsh/i3plus/pojo/mes/pcn/model/StepPrintSnModel.java b/modules/i3plus-pojo-mes-pcn/src/main/java/cn/estsh/i3plus/pojo/mes/pcn/model/StepPrintSnModel.java
index 53b974e..e72338c 100644
--- a/modules/i3plus-pojo-mes-pcn/src/main/java/cn/estsh/i3plus/pojo/mes/pcn/model/StepPrintSnModel.java
+++ b/modules/i3plus-pojo-mes-pcn/src/main/java/cn/estsh/i3plus/pojo/mes/pcn/model/StepPrintSnModel.java
@@ -1,6 +1,7 @@
 package cn.estsh.i3plus.pojo.mes.pcn.model;
 
 import cn.estsh.i3plus.pojo.mes.pcn.bean.MesProduceSn;
+import com.fasterxml.jackson.annotation.JsonInclude;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiParam;
 import lombok.Data;