diff --git a/autoload.php b/autoload.php
index 71a73d36..c0e7fdf6 100644
--- a/autoload.php
+++ b/autoload.php
@@ -21,14 +21,46 @@ class Autoload
          */
         private static ?\Composer\Autoload\ClassLoader $composerAutoloader = null;
 
-        public static function load(string $class)
+        public static function load(string $class): void
         {
             if (self::$composerAutoloader === null) {
-                self::$composerAutoloader = require __DIR__ . '/vendor/autoload.php';
+                self::$composerAutoloader = require self::getAutoloadFile();
             }
 
             self::$composerAutoloader->loadClass($class);
         }
+
+        private static function getAutoloadFile(): string
+        {
+            if (isset($_composer_autoload_path)) {
+                $possibleAutoloadPaths = [
+                    dirname($_composer_autoload_path)
+                ];
+                $autoloader = basename($_composer_autoload_path);
+            } else {
+                $possibleAutoloadPaths = [
+                    // local dev repository
+                    __DIR__,
+                    // dependency
+                    dirname(__DIR__, 3),
+                ];
+                $autoloader = 'vendor/autoload.php';
+            }
+
+            foreach ($possibleAutoloadPaths as $possibleAutoloadPath) {
+                if (file_exists($possibleAutoloadPath . DIRECTORY_SEPARATOR . $autoloader)) {
+                    return $possibleAutoloadPath . DIRECTORY_SEPARATOR . $autoloader;
+                }
+            }
+
+            throw new \RuntimeException(
+                sprintf(
+                    'Unable to find "%s" in "%s" paths.',
+                    $autoloader,
+                    implode('", "', $possibleAutoloadPaths)
+                )
+            );
+        }
     }
 
     spl_autoload_register(__NAMESPACE__ . '\Autoload::load', true, true);
diff --git a/config/bootstrap.php b/config/bootstrap.php
deleted file mode 100644
index 657ba84f..00000000
--- a/config/bootstrap.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/*
- * This file is part of the overtrue/phplint package
- *
- * (c) overtrue
- *
- * This source file is subject to the MIT license that is bundled
- * with this source code in the file LICENSE.
- *
- * @since Release 9.1.x
- * @author Laurent Laville
- */
-
-if (isset($_composer_autoload_path)) {
-    $possibleAutoloadPaths = [
-        dirname($_composer_autoload_path)
-    ];
-    $autoloader = basename($_composer_autoload_path);
-} else {
-    $possibleAutoloadPaths = [
-        // local dev repository
-        dirname(__DIR__),
-        // dependency
-        dirname(__DIR__, 4),
-    ];
-    $autoloader = 'vendor/autoload.php';
-}
-
-$isAutoloadFound = false;
-foreach ($possibleAutoloadPaths as $possibleAutoloadPath) {
-    if (file_exists($possibleAutoloadPath . DIRECTORY_SEPARATOR . $autoloader)) {
-        require_once $possibleAutoloadPath . DIRECTORY_SEPARATOR . $autoloader;
-        $isAutoloadFound = true;
-        $vendorDir = $possibleAutoloadPath . DIRECTORY_SEPARATOR . dirname($autoloader);
-        break;
-    }
-}
-
-if ($isAutoloadFound === false) {
-    throw new RuntimeException(
-        sprintf(
-            'Unable to find "%s" in "%s" paths.',
-            $autoloader,
-            implode('", "', $possibleAutoloadPaths)
-        )
-    );
-}