diff --git a/AsbCloudWebApi/Controllers/AutoGeneratedDailyReportController.cs b/AsbCloudWebApi/Controllers/AutoGeneratedDailyReportController.cs
index df94b605..f38a3ea8 100644
--- a/AsbCloudWebApi/Controllers/AutoGeneratedDailyReportController.cs
+++ b/AsbCloudWebApi/Controllers/AutoGeneratedDailyReportController.cs
@@ -53,7 +53,7 @@ public class AutoGeneratedDailyReportController : ControllerBase
 			reportDate,
 			cancellationToken);
 
-		return File(reportFile.stream, reportFile.fileName);
+		return File(reportFile.stream, "application/octet-stream", reportFile.fileName);
 	}
 
 	/// <summary>
diff --git a/AsbCloudWebApi/Controllers/DailyReportController.cs b/AsbCloudWebApi/Controllers/DailyReportController.cs
index 707421dd..45d7f135 100644
--- a/AsbCloudWebApi/Controllers/DailyReportController.cs
+++ b/AsbCloudWebApi/Controllers/DailyReportController.cs
@@ -162,7 +162,7 @@ namespace AsbCloudWebApi.Controllers
         /// <param name="token"></param>
         /// <returns></returns>
         [HttpGet("{date}/excel")]
-        [ProducesResponseType(typeof(PhysicalFileResult), (int)System.Net.HttpStatusCode.OK, "application/octet-stream")]
+        [ProducesResponseType(typeof(PhysicalFileResult), (int)System.Net.HttpStatusCode.OK)]
         [ProducesResponseType(StatusCodes.Status204NoContent)]
         public async Task<IActionResult> DownloadAsync(int idWell, DateOnly date, CancellationToken token)
         {
@@ -177,7 +177,7 @@ namespace AsbCloudWebApi.Controllers
                 return NoContent();
             
             var fileName = $"Суточный рапорт по скважине {well.Caption} куст {well.Cluster}.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
 
         }
 
diff --git a/AsbCloudWebApi/Controllers/PlannedTrajectoryController.cs b/AsbCloudWebApi/Controllers/PlannedTrajectoryController.cs
index 322dc454..54797cca 100644
--- a/AsbCloudWebApi/Controllers/PlannedTrajectoryController.cs
+++ b/AsbCloudWebApi/Controllers/PlannedTrajectoryController.cs
@@ -49,7 +49,7 @@ namespace AsbCloudWebApi.Controllers
         {
             var stream = plannedTrajectoryImportService.GetTemplateFile();
             var fileName = "ЕЦП_шаблон_файла_плановая_траектория.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
 
         /// <summary>
@@ -68,7 +68,7 @@ namespace AsbCloudWebApi.Controllers
                 return Forbid();
             var stream = await plannedTrajectoryImportService.ExportAsync(idWell, token);
             var fileName = await plannedTrajectoryImportService.GetFileNameAsync(idWell, token);
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
 
         /// <summary>
diff --git a/AsbCloudWebApi/Controllers/ProcessMapController.cs b/AsbCloudWebApi/Controllers/ProcessMapController.cs
index 0199cb9a..b2d97a71 100644
--- a/AsbCloudWebApi/Controllers/ProcessMapController.cs
+++ b/AsbCloudWebApi/Controllers/ProcessMapController.cs
@@ -170,7 +170,7 @@ namespace AsbCloudWebApi.Controllers
         {
             var stream = await processMapPlanImportService.GetExcelTemplateStreamAsync(cancellationToken);
             var fileName = "ЕЦП_шаблон_файла_РТК.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
 
         /// <summary>
@@ -236,7 +236,7 @@ namespace AsbCloudWebApi.Controllers
 
             var stream = await processMapPlanImportService.ExportAsync(idWell, cancellationToken);
             var fileName = $"РТК-план по скважине {well.Caption} куст {well.Cluster}.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
         
         private async Task NotifyUsersBySignalR(int idWell, CancellationToken token)
diff --git a/AsbCloudWebApi/Controllers/SAUB/TelemetryDataSaubController.cs b/AsbCloudWebApi/Controllers/SAUB/TelemetryDataSaubController.cs
index 5cf3fce0..be694818 100644
--- a/AsbCloudWebApi/Controllers/SAUB/TelemetryDataSaubController.cs
+++ b/AsbCloudWebApi/Controllers/SAUB/TelemetryDataSaubController.cs
@@ -60,7 +60,7 @@ namespace AsbCloudWebApi.Controllers.SAUB
 
             var stream = await telemetryDataSaubService.GetZippedCsv(idWell, beginDate, endDate, token).ConfigureAwait(false);
             var fileName = $"DataSaub idWell{idWell} {beginDate:yyyy-MM-DDTHH-mm} - {endDate:yyyy-MM-DDTHH-mm}.zip";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
     }
 }
diff --git a/AsbCloudWebApi/Controllers/WellOperationController.cs b/AsbCloudWebApi/Controllers/WellOperationController.cs
index 4bb40bdc..0ab6f0c1 100644
--- a/AsbCloudWebApi/Controllers/WellOperationController.cs
+++ b/AsbCloudWebApi/Controllers/WellOperationController.cs
@@ -333,7 +333,7 @@ namespace AsbCloudWebApi.Controllers
 
             var stream = wellOperationImportService.Export(idWell);
             var fileName = await wellService.GetWellCaptionByIdAsync(idWell, token) + "_operations.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
 
         /// <summary>
@@ -373,7 +373,7 @@ namespace AsbCloudWebApi.Controllers
         {
             var stream = wellOperationImportService.GetExcelTemplateStream();
             var fileName = "ЕЦП_шаблон_файла_операций.xlsx";
-            return File(stream, fileName);
+            return File(stream, "application/octet-stream", fileName);
         }
 
         private async Task<bool> CanUserAccessToWellAsync(int idWell, CancellationToken token)