diff --git a/system/HTTP/Exceptions/BadRequestException.php b/system/HTTP/Exceptions/BadRequestException.php
index e68e14f053e7..c87f4de294e2 100644
--- a/system/HTTP/Exceptions/BadRequestException.php
+++ b/system/HTTP/Exceptions/BadRequestException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * This file is part of CodeIgniter 4 framework.
  *