diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index dedbab55c..cb32f7bb3 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -886,7 +886,7 @@ class ExercisesController < ApplicationController
 
             ex_user_ids = exercise_users.pluck(:id)
 
-            EndExerciseCalculateJob.perform_later(ex_user_ids,exercise,Time.now)
+            EndExerciseCalculateJob.perform_later(ex_user_ids,exercise,Time.now.to_s)
             # exercise_users.each do |user|
             #   if user.commit_status == 0 && user.start_at.present?
             #     objective_score = calculate_student_score(exercise,user.user)[:total_score]
diff --git a/app/jobs/end_exercise_calculate_job.rb b/app/jobs/end_exercise_calculate_job.rb
index 35c6ded57..251496cb5 100644
--- a/app/jobs/end_exercise_calculate_job.rb
+++ b/app/jobs/end_exercise_calculate_job.rb
@@ -9,7 +9,7 @@ class EndExerciseCalculateJob < ApplicationJob
     exercise_users = ExerciseUser.where(id: ex_user_ids)
     exercise_users.each do |user|
       if user.commit_status == 0 && user.start_at.present?
-        objective_score = calculate_student_score(exercise,user.user,end_time)[:total_score]
+        objective_score = calculate_student_score(exercise,user.user,end_time.to_time)[:total_score]
         user_sub_score = user.subjective_score
         subjective_score = user_sub_score < 0.0 ? 0.0 : user_sub_score
         total_score = objective_score + subjective_score