diff --git a/airtime_mvc/application/controllers/ApiController.php b/airtime_mvc/application/controllers/ApiController.php
index 6bbe480da..065352ba7 100644
--- a/airtime_mvc/application/controllers/ApiController.php
+++ b/airtime_mvc/application/controllers/ApiController.php
@@ -42,8 +42,9 @@ class ApiController extends Zend_Controller_Action
                 ->addActionContext('reload-metadata-group'         , 'json')
                 ->addActionContext('notify-webstream-data'         , 'json')
                 ->addActionContext('get-stream-parameters'         , 'json')
-                ->addActionContext('push-stream-stats'         , 'json')
-                ->addActionContext('update-stream-setting-table'         , 'json')
+                ->addActionContext('push-stream-stats'             , 'json')
+                ->addActionContext('update-stream-setting-table'   , 'json')
+                ->addActionContext('update-replay-gain-value'      , 'json')
                 ->initContext();
     }
 
@@ -919,10 +920,6 @@ class ApiController extends Zend_Controller_Action
 
     public function updateReplayGainValueAction()
     {
-        // disable layout
-        $this->view->layout()->disableLayout();
-        $this->_helper->viewRenderer->setNoRender(true);
-
         $request = $this->getRequest();
         $data = json_decode($request->getParam('data'));
 
@@ -933,6 +930,8 @@ class ApiController extends Zend_Controller_Action
             $file->setDbReplayGain($gain);
             $file->save();
         }
+
+        $this->view->msg = "OK";
     }
     
     public function updateCueValuesBySilanAction()
diff --git a/python_apps/api_clients/api_client.cfg b/python_apps/api_clients/api_client.cfg
index d9a67b608..0f1050a61 100644
--- a/python_apps/api_clients/api_client.cfg
+++ b/python_apps/api_clients/api_client.cfg
@@ -115,7 +115,7 @@ get_bootstrap_info = 'get-bootstrap-info/format/json/api_key/%%api_key%%'
 
 get_files_without_replay_gain = 'get-files-without-replay-gain/api_key/%%api_key%%/dir_id/%%dir_id%%'
 
-update_replay_gain_value = 'update-replay-gain-value/api_key/%%api_key%%'
+update_replay_gain_value = 'update-replay-gain-value/format/json/api_key/%%api_key%%'
 
 notify_webstream_data = 'notify-webstream-data/api_key/%%api_key%%/media_id/%%media_id%%/format/json'
 
diff --git a/python_apps/pypo/media/update/replaygainupdater.py b/python_apps/pypo/media/update/replaygainupdater.py
index 2f52c0a23..0d971d432 100644
--- a/python_apps/pypo/media/update/replaygainupdater.py
+++ b/python_apps/pypo/media/update/replaygainupdater.py
@@ -58,7 +58,9 @@ class ReplayGainUpdater(Thread):
 
                     try:
                         self.api_client.update_replay_gain_values(processed_data)
-                    except Exception as e: self.unexpected_exception(e)
+                    except Exception as e:
+                        self.logger.error(e)
+                        self.logger.debug(traceback.format_exc())
 
                     if len(files) == 0: break
                 self.logger.info("Processed: %d songs" % total)