diff --git a/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
index 3d16d518..4032358f 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemActiveWellStatDto.cs
@@ -1,7 +1,6 @@
 using System.Collections.Generic;
 namespace AsbCloudApp.Data.Subsystems
 {
-#nullable enable
     /// <summary>
     /// Статистика наработки подсистем по активным скважинам
     /// </summary>
@@ -28,5 +27,4 @@ namespace AsbCloudApp.Data.Subsystems
         /// </summary>
         public SubsystemStatDto? SubsystemTorqueMaster { get; set; }
     }
-#nullable disable
 }
\ No newline at end of file
diff --git a/AsbCloudApp/Data/Subsystems/SubsystemDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemDto.cs
index 515c69a7..bfb7f9d2 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemDto.cs
@@ -12,10 +12,10 @@
         /// <summary>
         /// Наименование подсистемы
         /// </summary>
-        public string Name { get; set; }
+        public string Name { get; set; } = null!;
         /// <summary>
         /// Детальное описание подсистемы
         /// </summary>
-        public string Description { get; set; }
+        public string Description { get; set; } = string.Empty;
     }
 }
diff --git a/AsbCloudApp/Data/Subsystems/SubsystemOperationTimeDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemOperationTimeDto.cs
index 98047c84..50a373d0 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemOperationTimeDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemOperationTimeDto.cs
@@ -17,7 +17,7 @@ namespace AsbCloudApp.Data.Subsystems
         /// <summary>
         /// Название подсистемы
         /// </summary>
-        public string SubsystemName { get; set; }
+        public string SubsystemName { get; set; } = null!;
         /// <summary>
         /// дата/время включения подсистемы
         /// </summary>
diff --git a/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs b/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
index c257d029..aec6c6b8 100644
--- a/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
+++ b/AsbCloudApp/Data/Subsystems/SubsystemStatDto.cs
@@ -13,7 +13,7 @@ namespace AsbCloudApp.Data.Subsystems
         /// <summary>
         /// Название подсистемы
         /// </summary>
-        public string SubsystemName { get; set; }
+        public string SubsystemName { get; set; } = null!;
         /// <summary>
         /// наработка подсистемы
         /// </summary>