diff --git a/AsbCloudApp/Services/Notifications/NotificationService.cs b/AsbCloudApp/Services/Notifications/NotificationService.cs
index 849a2833..270d90db 100644
--- a/AsbCloudApp/Services/Notifications/NotificationService.cs
+++ b/AsbCloudApp/Services/Notifications/NotificationService.cs
@@ -92,13 +92,10 @@ public class NotificationService
             cancellationToken)
             ?? throw new ArgumentInvalidException("Уведомление не найдено", nameof(idNotification));
 
-        if (isRead)
-        {
-            if (notification.SentDate == null)
-                throw new ArgumentInvalidException("Уведомление не может быть прочитано", nameof(isRead));
-
-            notification.SentDate = DateTime.UtcNow;
-        }
+        if(isRead && !notification.SentDate.HasValue)
+            throw new ArgumentInvalidException("Уведомление не может быть прочитано", nameof(isRead));
+        
+        notification.ReadDate = isRead ? DateTime.UtcNow : null;
 
         await notificationRepository.UpdateAsync(notification,
             cancellationToken);