diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 46c68e4..3572ffa 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -85,9 +85,6 @@ jobs:
       - name: PHPUnit configuration file
         run: xmllint --schema vendor/phpunit/phpunit/phpunit.xsd --noout phpunit.xml.dist
 
-      - name: PHPCodeSniffer configuration file
-        run: xmllint --schema vendor/squizlabs/php_codesniffer/phpcs.xsd --noout phpcs.xml.dist
-
       - name: Fetch schema for xliff
         run: wget https://docs.oasis-open.org/xliff/v1.2/os/xliff-core-1.2-strict.xsd --output-document=.Build/xliff-core-1.2-strict.xsd
 
@@ -121,7 +118,7 @@ jobs:
         run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Coding Guideline
-        run: ./vendor/bin/phpcs
+        run: ./vendor/bin/ecs
 
   tests:
     runs-on: ubuntu-latest
diff --git a/Tests/Unit/Domain/Model/NullDataFactoryTest.php b/Tests/Unit/Domain/Model/NullDataFactoryTest.php
index 7e4ea07..e50aac7 100644
--- a/Tests/Unit/Domain/Model/NullDataFactoryTest.php
+++ b/Tests/Unit/Domain/Model/NullDataFactoryTest.php
@@ -21,10 +21,10 @@ namespace WerkraumMedia\Calendar\Tests\Unit\Domain\Model;
  * 02110-1301, USA.
  */
 
+use PHPUnit\Framework\TestCase;
 use Prophecy\PhpUnit\ProphecyTrait;
 use WerkraumMedia\Calendar\Domain\Model\Day;
 use WerkraumMedia\Calendar\Domain\Model\NullDataFactory;
-use PHPUnit\Framework\TestCase;
 
 /**
  * @covers WerkraumMedia\Calendar\Domain\Model\NullDataFactory
diff --git a/composer.json b/composer.json
index f9ab537..13eaaee 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
         "maglnet/composer-require-checker": "^2.1",
         "phpspec/prophecy-phpunit": "^2.0",
         "phpunit/phpunit": "^9.5",
-        "squizlabs/php_codesniffer": "^3.5"
+        "symplify/easy-coding-standard": "^9.2"
     },
     "extra": {
         "typo3/cms": {
diff --git a/ecs.php b/ecs.php
new file mode 100644
index 0000000..379a801
--- /dev/null
+++ b/ecs.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Fixer\ArrayNotation\ArraySyntaxFixer;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+use Symplify\EasyCodingStandard\ValueObject\Option;
+use Symplify\EasyCodingStandard\ValueObject\Set\SetList;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $parameters = $containerConfigurator->parameters();
+    $parameters->set(Option::PATHS, [
+        __DIR__ . '/Classes',
+        __DIR__ . '/Tests',
+        __DIR__ . '/ext_emconf.php',
+        __DIR__ . '/ecs.php',
+    ]);
+
+    $parameters->set(Option::SETS, [
+        // run and fix, one by one
+        // SetList::SPACES,
+        // SetList::ARRAY,
+        // SetList::DOCBLOCK,
+        // SetList::NAMESPACES,
+        // SetList::CONTROL_STRUCTURES,
+        // SetList::CLEAN_CODE,
+        SetList::PSR_12,
+    ]);
+
+    $services = $containerConfigurator->services();
+    $services->set(ArraySyntaxFixer::class)
+        ->call('configure', [[
+            'syntax' => 'short',
+        ]]);
+};
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
deleted file mode 100644
index 68b095a..0000000
--- a/phpcs.xml.dist
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0"?>
-<ruleset name="project">
-    <description>This project coding standard</description>
-
-    <file>Classes/</file>
-    <file>Tests/</file>
-
-    <!-- Set default settings -->
-    <arg value="sp"/>
-    <arg name="colors"/>
-    <arg name="encoding" value="utf-8" />
-    <arg name="extensions" value="php" />
-
-    <!-- Base rules -->
-    <rule ref="PSR12" />
-    <rule ref="Generic.Files.LineLength.TooLong">
-        <exclude-pattern>/Tests/*</exclude-pattern>
-    </rule>
-</ruleset>