diff --git a/phpstan-bootstrap.php b/phpstan-bootstrap.php
index ce8e4636bd11..0f45bf0cb559 100644
--- a/phpstan-bootstrap.php
+++ b/phpstan-bootstrap.php
@@ -2,6 +2,17 @@
 
 require __DIR__ . '/system/util_bootstrap.php';
 
-if (! defined('OCI_COMMIT_ON_SUCCESS')) {
-    define('OCI_COMMIT_ON_SUCCESS', 32);
+defined('OCI_COMMIT_ON_SUCCESS') || define('OCI_COMMIT_ON_SUCCESS', 32);
+
+foreach ([
+    'app/Config',
+] as $directory) {
+    $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory));
+
+    /** @var SplFileInfo $file */
+    foreach ($iterator as $file) {
+        if ($file->isFile() && $file->getExtension() === 'php') {
+            require_once $file->getRealPath();
+        }
+    }
 }
diff --git a/rector.php b/rector.php
index 4f1504f270be..c814a7402c4d 100644
--- a/rector.php
+++ b/rector.php
@@ -71,7 +71,7 @@
     ])
     // do you need to include constants, class aliases or custom autoloader? files listed will be executed
     ->withBootstrapFiles([
-        __DIR__ . '/system/util_bootstrap.php',
+        __DIR__ . '/phpstan-bootstrap.php',
     ])
     ->withPHPStanConfigs([
         __DIR__ . '/phpstan.neon.dist',