diff --git a/app/Helpers/MasterFunctionsHelper.php b/app/Helpers/MasterFunctionsHelper.php
index 0a817d5..07e2c74 100644
--- a/app/Helpers/MasterFunctionsHelper.php
+++ b/app/Helpers/MasterFunctionsHelper.php
@@ -201,7 +201,6 @@ class MasterFunctionsHelper
 				->max("a.planned_end"); // plan date overlapped with assign_material_to_activity's, it should be m_activity'
 			$maxDate = max(new \DateTime($plannedMaxDate), new \DateTime($actualMaxDate));
 			$end = $maxDate;
-			$end->modify('last month');
 			$interval = new \DateInterval('P7D');
 		}
 		$period = new \DatePeriod($begin, $interval, $end);