diff --git a/app/views/challenges/index.json.jbuilder b/app/views/challenges/index.json.jbuilder
index c53ab9c58..eb7ee900d 100644
--- a/app/views/challenges/index.json.jbuilder
+++ b/app/views/challenges/index.json.jbuilder
@@ -19,7 +19,7 @@ if @challenges.present?
     json.passed_count challenge.user_passed_count
     json.playing_count challenge.playing_count
     json.name_url shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)
-    #json.open_game challenge.open_game(@user.id, @shixun)
+    json.open_game challenge.open_game(@user.id, @shixun)
     if @editable
       json.edit_url edit_shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)
       json.delete_url shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)