diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 56453c858..8d1cc7ba0 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -11,6 +11,9 @@
         __DIR__ . '/sources',
         __DIR__ . '/tests',
     ])
+    ->exclude([
+        __DIR__ . '/app/config/reference.php',
+    ])
 ;
 
 return (new PhpCsFixer\Config())