diff --git a/src/SJZY.Track.Application/Dtos/TrackFlags/EditTrackFlagInput.cs b/src/SJZY.Track.Application/Dtos/TrackFlags/EditTrackFlagInput.cs
index 05c9b56c..901f5e5a 100644
--- a/src/SJZY.Track.Application/Dtos/TrackFlags/EditTrackFlagInput.cs
+++ b/src/SJZY.Track.Application/Dtos/TrackFlags/EditTrackFlagInput.cs
@@ -26,12 +26,12 @@ namespace SJZY.Track.Application.Dtos.TrackFlags
         /// <summary>
         /// 标记
         /// </summary>
-        public string Flag { get; set; }
+        public string? Flag { get; set; }
 
         /// <summary>
         /// 代码
         /// </summary>
-        public string Code { get; set; }
+        public string? Code { get; set; }
 
         /// <summary>
         /// 是否完结