diff --git a/kiri-engine/Error/StdoutLogger.php b/kiri-engine/Error/StdoutLogger.php
index 9ed3b3e7..3e99000f 100644
--- a/kiri-engine/Error/StdoutLogger.php
+++ b/kiri-engine/Error/StdoutLogger.php
@@ -100,7 +100,7 @@ class StdoutLogger extends Component
      * @param string $message
      * @return void
      */
-    public function println(string $message): void
+    public function println(mixed $message): void
     {
         file_put_contents('php://output', '[' . date('Y-m-d H:i:s') . '] ' . $message . PHP_EOL, FILE_APPEND);
     }