diff --git a/app/Http/Controllers/API/CampaignAPIController.php b/app/Http/Controllers/API/CampaignAPIController.php
index c989bed..49c0e49 100644
--- a/app/Http/Controllers/API/CampaignAPIController.php
+++ b/app/Http/Controllers/API/CampaignAPIController.php
@@ -92,7 +92,7 @@ public function show($id) {
             $ret['settings']['inner_image_url'] = cosUrl($campaign->settings['inner_image_url']);
             $ret['settings']['share_image_url'] = cosUrl($campaign->settings['share_image_url']);
             if (isset($campaign->settings['sell']['picUrl'])) {
-                $ret['settings']['sell'] = cosUrl($campaign->settings['sell']);
+                $ret['settings']['sell']['picUrl'] = cosUrl($campaign->settings['sell']['picUrl']);
             }
             $ret['poem_count'] = $campaign->poem_count;
             $ret['user_count'] = $campaign->user_count;