diff --git a/webapp/controller/HashRateController.class.php b/webapp/controller/HashRateController.class.php
index e082d1cb..f05cf849 100644
--- a/webapp/controller/HashRateController.class.php
+++ b/webapp/controller/HashRateController.class.php
@@ -175,9 +175,10 @@ class HashRateController extends BaseAuthedController
             $this->_rspErr(1, 'Already ended');
             return;
         }
+
         $tips = array();
         for ($i=1;$i<5;$i++){
-            foreach ($this->hashRateService->hashRateTask['task'.$i] as $task){
+            foreach ($this->hashRateService->getHashRateTasks($i) as $task){
                 $taskDb = HashRate::find($task['task_id'],$currentPeriod['id']);
                 $taskDto = $this->hashRateService->hashRateTaskDto($task,$taskDb,$currentPeriod['id']);
                 if ($taskDto['state'] == \services\HashRateService::FINISHED_STATE){