diff --git a/app/views/hack_user_lastest_codes/record_detail.json.jbuilder b/app/views/hack_user_lastest_codes/record_detail.json.jbuilder
index b2f567879..b007fafbf 100644
--- a/app/views/hack_user_lastest_codes/record_detail.json.jbuilder
+++ b/app/views/hack_user_lastest_codes/record_detail.json.jbuilder
@@ -1,4 +1,4 @@
 json.(@hack_user, :id, :status, :error_line, :error_msg, :expected_output,
-    :input, :output, :execute_time, :execute_memory)
+    :input, :output, :execute_time, :execute_memory, :created_at)
 json.language @hack_user.hack.language
 json.name @hack_user.hack.name
\ No newline at end of file