diff --git a/lib/Controller/AdminSettingController.php b/lib/Controller/AdminSettingController.php
index 0eb9b57..aa11d9a 100644
--- a/lib/Controller/AdminSettingController.php
+++ b/lib/Controller/AdminSettingController.php
@@ -69,7 +69,7 @@ class AdminSettingController extends Controller
     public function exportConfiguration()
     {
         $keys = $this->config->getAppKeys(Application::APP_ID);
-        $config = [];
+        $appConfig = [];
         $excludedKeys = [
             'cache',
             'cache-categories',
@@ -80,11 +80,11 @@ class AdminSettingController extends Controller
                 continue;
             }
 
-            $config[$key] = $this->config->getAppValue(Application::APP_ID, $key);
+            $appConfig[$key] = $this->config->getAppValue(Application::APP_ID, $key);
         }
 
         return new DataDownloadResponse(
-            json_encode($config, JSON_PRETTY_PRINT),
+            json_encode($appConfig, JSON_PRETTY_PRINT),
             'config.json',
             'text/json'
         );