diff --git a/configuration.php b/configuration.php
index faa1b440..12fdb9a5 100644
--- a/configuration.php
+++ b/configuration.php
@@ -47,4 +47,9 @@
     // specify a custom template
     //'psx_error_template'      => null,
 
+    // Global middleware which are applied before and after every request. Must
+    // bei either a classname, closure or PSX\Dispatch\FilterInterface instance
+    //'psx_filter_pre'          => [],
+    //'psx_filter_post'         => [],
+
 );