diff --git a/server/dotnet/UploadHandler.cs b/server/dotnet/UploadHandler.cs
index ce380b322..857f54326 100644
--- a/server/dotnet/UploadHandler.cs
+++ b/server/dotnet/UploadHandler.cs
@@ -396,7 +396,7 @@ public static string Serialize<T>(T obj)
             using (MemoryStream ms = new MemoryStream())
             {
                 serializer.WriteObject(ms, obj);
-                return Encoding.Default.GetString(ms.ToArray());
+                return Encoding.UTF8.GetString(ms.ToArray());
             }
         }
     }