diff --git a/src/Khd.Core.Domain/Models/WcsTask.cs b/src/Khd.Core.Domain/Models/WcsTask.cs
index 81a1e9a..a724bad 100644
--- a/src/Khd.Core.Domain/Models/WcsTask.cs
+++ b/src/Khd.Core.Domain/Models/WcsTask.cs
@@ -26,7 +26,7 @@ namespace  Khd.Core.Domain.Models
         /// 流水号
         /// </summary>
        [Column("serial_no")]
-        public string serialNo { get; set; }
+        public long serialNo { get; set; }
     
         /// <summary>
         /// 设备编号
diff --git a/src/Khd.Core.Domain/Models/WcsTaskLog.cs b/src/Khd.Core.Domain/Models/WcsTaskLog.cs
index f344e8b..4d49a37 100644
--- a/src/Khd.Core.Domain/Models/WcsTaskLog.cs
+++ b/src/Khd.Core.Domain/Models/WcsTaskLog.cs
@@ -32,7 +32,7 @@ namespace  Khd.Core.Domain.Models
         /// 流水号
         /// </summary>
        [Column("serial_no")]
-        public string serialNo { get; set; }
+        public long serialNo { get; set; }
     
         /// <summary>
         /// 设备编号