diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index b6d2355f0..4cbd46fd6 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -65,5 +65,6 @@
             ->in(__DIR__.'/{.phpstan,demo,examples,fixtures,src}')
             ->append([__FILE__])
             ->exclude('var')
+            ->notPath('demo/config/reference.php')
     )
 ;