diff --git a/Assets/Script/Misc/Types/DataFormats/SongDetail.cs b/Assets/Script/Misc/Types/DataFormats/SongDetail.cs
index 94ee7110..1e87524c 100644
--- a/Assets/Script/Misc/Types/DataFormats/SongDetail.cs
+++ b/Assets/Script/Misc/Types/DataFormats/SongDetail.cs
@@ -213,7 +213,9 @@ public async Task<SongDetail> DumpToLocal()
             }
 
             var info = new DirectoryInfo(dir);
-            return await ParseAsync(info.GetFiles());
+            var song = await ParseAsync(info.GetFiles());
+            song.Hash = Hash;
+            return song;
         }
 
     }
diff --git a/Assets/Script/Utils/SongStorage.cs b/Assets/Script/Utils/SongStorage.cs
index 0a9ca14e..0bf38b85 100644
--- a/Assets/Script/Utils/SongStorage.cs
+++ b/Assets/Script/Utils/SongStorage.cs
@@ -164,7 +164,7 @@ static async Task<SongCollection> GetOnlineCollection(string apiroot)
                         TrackPath = apiroot + "/Track/" + song.Id,
                         BGPath = apiroot + "/ImageFull/" + song.Id,
                         CoverPath = apiroot + "/Image/" + song.Id,
-                        Hash = song.Id.ToString(),
+                        Hash = song.Id.ToString()+"//" + song.Timestamp,
                         AddTime = dateTime
                     };
                     for (int i = 0; i < songDetail.Designers.Count(); i++)