diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
index 77714dd39..9827fcd8e 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
@@ -2571,7 +2571,7 @@ namespace IRaCIS.Application.Services
             var value = _provider.Get<string>(cacheKey).Value;
             if (value == null)
             {
-                _provider.Set(cacheKey, DateTime.Now.ToString(), TimeSpan.FromHours(5));
+                _provider.Set(cacheKey, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), TimeSpan.FromHours(5));
               //  _cache.Set(cacheKey, DateTime.Now.ToString(), TimeSpan.FromHours(5));
 
             }