diff --git a/app/tasks/exercise_publish_task.rb b/app/tasks/exercise_publish_task.rb
index 8e206b3dd..60ee8a704 100644
--- a/app/tasks/exercise_publish_task.rb
+++ b/app/tasks/exercise_publish_task.rb
@@ -49,7 +49,7 @@ class ExercisePublishTask
     exercises = Exercise.includes(:exercise_questions).where("exercise_status = 2 AND end_time <= ?",Time.now + 900)
     exercises.each do |exercise|
       Rails.logger.info("end_exercise_id: #{exercise.id}")
-      exercise.update_attributes!('exercise_status', 3)
+      exercise.update_attributes!(exercise_status: 3)
       if exercise.unified_setting
         ex_type = exercise.exercise_questions.pluck(:question_type).uniq
         exercise.exercise_users.where("commit_status = 0 and start_at is not null").each do |exercise_user|