diff --git a/ecs.php b/ecs.php
index a802719..90f81b1 100644
--- a/ecs.php
+++ b/ecs.php
@@ -37,9 +37,6 @@
         PhpdocToPropertyTypeFixer::class => [
             __DIR__ . '/src/*',
         ],
-        DeclareStrictTypesFixer::class => [
-            __DIR__ . '/src/*',
-        ],
     ]);
 
     $ecsConfig->import(__DIR__ . '/vendor/shopsys/coding-standards/ecs.php', null, true);