diff --git a/src/Controller.php b/src/Controller.php
index a6c4cb9..284374a 100644
--- a/src/Controller.php
+++ b/src/Controller.php
@@ -80,7 +80,7 @@ public function handle(ServerRequestInterface $request): ResponseInterface
                     'query_params'  => $request->getQueryParams(),
                     'parsed_body'   => $request->getParsedBody(),
                     'code'          => $e->getCode(),
-                    'trace'         => $e->getTraceAsString()
+                    'trace'         => $e->getTraceAsString(),
                 ], JSON_PRETTY_PRINT);
 
                 $logger->error("[OAuth][{$this->getProviderName()}] {$e->getMessage()}: {$detail}");