diff --git a/composer.json b/composer.json
index 92b3e58..a582c39 100644
--- a/composer.json
+++ b/composer.json
@@ -13,12 +13,12 @@
         "php": "~8.2.0 || ~8.3.0",
         "ext-mbstring": "*",
         "ext-tokenizer": "*",
-        "friendsofphp/php-cs-fixer": "^3.58.1"
+        "friendsofphp/php-cs-fixer": "^3.59.3"
     },
     "require-dev": {
         "phpstan/phpstan": "^1.11.4",
         "phpstan/phpstan-phpunit": "^1.4.0",
-        "phpunit/phpunit": "^11.2.1"
+        "phpunit/phpunit": "^11.2.2"
     },
     "autoload": {
         "psr-4": {
diff --git a/lib/Config.php b/lib/Config.php
index 8958d51..65f0090 100644
--- a/lib/Config.php
+++ b/lib/Config.php
@@ -68,6 +68,7 @@ final class Config extends PhpCsFixerConfig
         'single_line_throw'                                 => false,
         'space_after_semicolon'                             => true,
         'static_lambda'                                     => false,
+        'string_implicit_backslashes'                       => ['single_quoted' => 'escape'],
         'unary_operator_spaces'                             => false,
         'use_arrow_functions'                               => false,
     ];
diff --git a/lib/FinalInternalClassFixer.php b/lib/FinalInternalClassFixer.php
index 60f98e8..b8f4a24 100644
--- a/lib/FinalInternalClassFixer.php
+++ b/lib/FinalInternalClassFixer.php
@@ -83,7 +83,7 @@ private static function isDoctrineEntity(Tokens $tokens, int $classIndex): bool
             for ($index = $attributeOpenIndex; $index < $classIndex; ++$index) {
                 $content .= $tokens[$index]->getContent();
             }
-            if (1 === \preg_match(\sprintf('/^#\[%s/', self::REGEX), $content)) {
+            if (1 === \preg_match(\sprintf('/^#\\[%s/', self::REGEX), $content)) {
                 return true;
             }
 
diff --git a/tests/FunctionReferenceSpaceFixerTest.php b/tests/FunctionReferenceSpaceFixerTest.php
index 33ba5e7..299cb9f 100644
--- a/tests/FunctionReferenceSpaceFixerTest.php
+++ b/tests/FunctionReferenceSpaceFixerTest.php
@@ -26,7 +26,7 @@ public static function provideCases(): array
             $use = \str_replace(' = array()', '', $use);
             $use = \str_replace('$array', '$secondArray', $use);
 
-            $invariant = \PHP_EOL . \preg_replace('/\s+/', ' ', '
+            $invariant = \PHP_EOL . \preg_replace('/\\s+/', ' ', '
                 $var =&  $var;
                 $var =& $var;
                 $var =&$var;