diff --git a/Marco.Pms.Services/Controllers/DocumentController.cs b/Marco.Pms.Services/Controllers/DocumentController.cs
index 3c0ce01..0b5c01a 100644
--- a/Marco.Pms.Services/Controllers/DocumentController.cs
+++ b/Marco.Pms.Services/Controllers/DocumentController.cs
@@ -165,9 +165,8 @@ namespace Marco.Pms.Services.Controllers
                         if (documentFilter.IsUploadedAt)
                         {
                             documentQuery = documentQuery.Where(da =>
-                                da.UpdatedAt.HasValue &&
-                                da.UpdatedAt.Value.Date >= documentFilter.StartDate.Value.Date &&
-                                da.UpdatedAt.Value.Date <= documentFilter.EndDate.Value.Date);
+                                da.UploadedAt.Date >= documentFilter.StartDate.Value.Date &&
+                                da.UploadedAt.Date <= documentFilter.EndDate.Value.Date);
                         }
                         else
                         {