diff --git a/source/Plugins/AyaNova.Plugin.V8/V8.cs b/source/Plugins/AyaNova.Plugin.V8/V8.cs
index 4433475..a16cf5d 100644
--- a/source/Plugins/AyaNova.Plugin.V8/V8.cs
+++ b/source/Plugins/AyaNova.Plugin.V8/V8.cs
@@ -390,7 +390,7 @@ namespace AyaNova.PlugIn.V8
                     a = await util.GetAsync("UserOptions/" + RavenId.ToString());
                     d = a.ObjectResponse["data"];
                     d.uiColor = System.Drawing.ColorTranslator.ToHtml(System.Drawing.Color.FromArgb(c.ScheduleBackColor));
-                    d.emailAddress = c.EmailAddress;
+                    d.emailAddress = string.IsNullOrWhiteSpace(c.EmailAddress)?null:c.EmailAddress;
 
                    await util.PutAsync("UserOptions/" + RavenId.ToString(), d.ToString());
                 }