diff --git a/app/views/api/pm/weekly_issues/personal_issues.json.jbuilder b/app/views/api/pm/weekly_issues/personal_issues.json.jbuilder
index 6c2f67909..d4f89b375 100644
--- a/app/views/api/pm/weekly_issues/personal_issues.json.jbuilder
+++ b/app/views/api/pm/weekly_issues/personal_issues.json.jbuilder
@@ -3,6 +3,6 @@ json.this_week_all_issues @this_week_all_issues.each do |issue|
 end
 json.this_week_total_count @this_week_all_issues.total_count
 json.next_week_all_issues @next_week_all_issues.each do |issue|
-  json.partial! "api/pm/weekly_issues/simple_detail", locals: {issue: issue, weekly_begin_date: @weekly_begin_date+1.week, weekly_end_date: @weekly_end_date+1.week}
+  json.partial! "api/pm/weekly_issues/simple_detail", locals: {issue: issue, weekly_begin_date: @weekly_begin_date.to_date+1.week, weekly_end_date: @weekly_end_date.to_date+1.week}
 end
 json.next_week_total_count @next_week_all_issues.total_count
\ No newline at end of file