diff --git a/AsbCloudInfrastructure/Services/Email/EmailNotificationTransportService.cs b/AsbCloudInfrastructure/Services/Email/EmailNotificationTransportService.cs
index 3a01c33d..2dd225f6 100644
--- a/AsbCloudInfrastructure/Services/Email/EmailNotificationTransportService.cs
+++ b/AsbCloudInfrastructure/Services/Email/EmailNotificationTransportService.cs
@@ -105,9 +105,9 @@ namespace AsbCloudInfrastructure.Services.Email
 
                 notification.SentDate = DateTime.UtcNow;
 
-                var notificationRepository = serviceProvider.GetService<INotificationRepository>();
+                var notificationRepository = serviceProvider.GetRequiredService<INotificationRepository>();
 
-                await notificationRepository!.UpdateAsync(notification, token);
+                await notificationRepository.UpdateAsync(notification, token);
                 
                 Trace.TraceInformation($"Send email to {notification.User.Email} subj:{notification.Title} html body count {notification.Message.Length}");
             };