diff --git a/src/ClientException.php b/src/ClientException.php
index 09956f6..9fc223b 100644
--- a/src/ClientException.php
+++ b/src/ClientException.php
@@ -12,7 +12,7 @@ class ClientException extends BaseException implements ClientAvailableInterface
     /**
      * @param string $template
      * @param array<string, scalar|scalar[]>  $parameters
-     * @param array<string, scalar|mixed[]>  $debugData
+     * @param array<string, scalar|mixed>  $debugData
      */
     public function __construct(string $template, array $parameters = [], array $debugData = [])
     {