diff --git a/LawFim/LawFirmRestApi/Program.cs b/LawFim/LawFirmRestApi/Program.cs
index dffd5de..aef144f 100644
--- a/LawFim/LawFirmRestApi/Program.cs
+++ b/LawFim/LawFirmRestApi/Program.cs
@@ -46,7 +46,7 @@ builder.Services.AddTransient<AbstractSaveToWordVisitsLawyer, SaveToWordVisitsLa
 builder.Services.AddTransient<AbstractSaveToPdfConsultationHearing, SaveToPdfConsultationHearing>();
 builder.Services.AddTransient<AbstractSaveToPdfCaseHearing, SaveToPdfCaseHearing>();
 builder.Services.AddTransient<AbstractSaveToPdfClients, SaveToPdfClients>();
-builder.Services.AddTransient<AbstractMailWorker, MailKitWorker>();
+builder.Services.AddSingleton<AbstractMailWorker, MailKitWorker>();
 
 builder.Services.AddControllers();
 // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle