diff --git a/Tiobon.Core.Services/Ghre/Ghre_CourseWareServices.cs b/Tiobon.Core.Services/Ghre/Ghre_CourseWareServices.cs
index c2ba2344..1d08397d 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_CourseWareServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_CourseWareServices.cs
@@ -157,7 +157,7 @@ public class Ghre_CourseWareServices : BaseServices<Ghre_CourseWare, Ghre_Course
             if (files.Length > 1)
                 CreateZip($"{webRootPath}{outPath}", files);
             else
-                outPath = files[0];
+                outPath = attachments[0].RelativePath;
             return ServiceResult<string>.OprateSuccess(null, outPath);
         }
         else