diff --git a/composer.json b/composer.json
index 4622bdf..e375a49 100644
--- a/composer.json
+++ b/composer.json
@@ -24,12 +24,12 @@
         "symfony/console": "^5.3||^6||^7"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "3.51.0",
+        "friendsofphp/php-cs-fixer": "3.64.0",
         "guzzlehttp/guzzle": "^7.8.1",
         "pear/http_request2": "2.6.0",
         "phpmd/phpmd": "2.15.0",
-        "phpstan/phpstan": "1.10.59",
-        "phpunit/phpunit": "10.5.11",
+        "phpstan/phpstan": "1.12.7",
+        "phpunit/phpunit": "10.5.36",
         "phing/phing": "3.0",
         "squizlabs/php_codesniffer": "3.9.0"
     },
diff --git a/tests/vufind.php-cs-fixer.php b/tests/vufind.php-cs-fixer.php
index 8b205b7..1780144 100644
--- a/tests/vufind.php-cs-fixer.php
+++ b/tests/vufind.php-cs-fixer.php
@@ -76,4 +76,5 @@
 return $config->setCacheFile($cacheDir . '/.code.cache')
     ->setRiskyAllowed(true)
     ->setRules($rules)
-    ->setFinder($finder);
+    ->setFinder($finder)
+    ->setParallelConfig(\PhpCsFixer\Runner\Parallel\ParallelConfigFactory::detect());