diff --git a/.dockerignore b/.dockerignore
index 3abd450ad7e..db528c4c65c 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -9,8 +9,7 @@ phpstan.neon
 rector.php
 phpunit.xml
 ecs.php
-ecs-after-rector.php
-changelog-linker.yaml
+changelog-linker.php
 
 LICENSE
 
diff --git a/README.md b/README.md
index f2f0444fc95..97ead315583 100644
--- a/README.md
+++ b/README.md
@@ -259,4 +259,4 @@ Do you use Rector to upgrade your code? Add it here:
 
 Rector uses [nikic/php-parser](https://github.com/nikic/PHP-Parser/), built on technology called an *abstract syntax tree* (AST). An AST doesn't know about spaces and when written to a file it produces poorly formatted code in both PHP and docblock annotations. **That's why your project needs to have a coding standard tool** and a set of formatting rules, so it can make Rector's output code nice and shiny again.
 
-Don't have a coding standard tool? Add [ECS](https://github.com/Symplify/EasyCodingStandard) and use prepared [`ecs-after-rector.php`](/ecs-after-rector.php) set.
+We're using [ECS](https://github.com/symplify/easy-coding-standard) with [this setup](ecs.php).
diff --git a/ecs-after-rector.php b/ecs-after-rector.php
deleted file mode 100644
index 5ac3cc87366..00000000000
--- a/ecs-after-rector.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php declare(strict_types=1);
-
-use Rector\Core\Configuration\Option;
-use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
-use PhpCsFixer\Fixer\ClassNotation\ClassAttributesSeparationFixer;
-use PhpCsFixer\Fixer\Comment\NoTrailingWhitespaceInCommentFixer;
-use PhpCsFixer\Fixer\Import\NoLeadingImportSlashFixer;
-use PhpCsFixer\Fixer\Import\NoUnusedImportsFixer;
-use PhpCsFixer\Fixer\Import\OrderedImportsFixer;
-use PhpCsFixer\Fixer\Phpdoc\NoEmptyPhpdocFixer;
-use PhpCsFixer\Fixer\Strict\DeclareStrictTypesFixer;
-use Symplify\EasyCodingStandard\ValueObject\Set\SetList;
-
-return static function (ContainerConfigurator $containerConfigurator): void {
-    $services = $containerConfigurator->services();
-
-    $services->set(NoUnusedImportsFixer::class);
-    $services->set(OrderedImportsFixer::class);
-    $services->set(NoLeadingImportSlashFixer::class);
-    $services->set(NoTrailingWhitespaceInCommentFixer::class);
-    $services->set(NoEmptyPhpdocFixer::class);
-    $services->set(ClassAttributesSeparationFixer::class);
-    $services->set(DeclareStrictTypesFixer::class);
-
-    $parameters = $containerConfigurator->parameters();
-
-    $parameters->set(Option::SETS, [
-        SetList::DOCTRINE_ANNOTATIONS,
-    ]);
-};