diff --git a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
index e69ef535..6dce80c6 100644
--- a/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
+++ b/AsbCloudWebApi/Controllers/Subsystems/SubsystemOperationTimeController.cs
@@ -63,7 +63,7 @@ namespace AsbCloudWebApi.Controllers.Subsystems
         /// получить доступный диапазон дат наработки подсистемы. 
         /// </summary>
         [HttpGet("rangeDate")]
-        [ProducesResponseType(typeof(IEnumerable<SubsystemDto>), (int)System.Net.HttpStatusCode.OK)]
+        [ProducesResponseType(typeof(IEnumerable<(DateTimeOffset,DateTimeOffset)>), (int)System.Net.HttpStatusCode.OK)]
         public async Task<IActionResult> GetDateRangeOperationTimeAsync([FromQuery] SubsystemOperationTimeRequest request, CancellationToken token = default)
         {
             if (!await UserHasAccesToWellAsync(request.IdWell, token))