diff --git a/.idea/php.xml b/.idea/php.xml
index 0c0236e..1a10fe4 100644
--- a/.idea/php.xml
+++ b/.idea/php.xml
@@ -1,5 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="MessDetectorOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
+  <component name="PHPCSFixerOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
+  <component name="PHPCodeSnifferOptionsConfiguration">
+    <option name="highlightLevel" value="WARNING" />
+    <option name="transferred" value="true" />
+  </component>
   <component name="PhpIncludePathManager">
     <include_path>
       <path value="$PROJECT_DIR$/vendor/phar-io/version" />
@@ -44,9 +54,16 @@
   <component name="PhpProjectSharedConfiguration" php_language_level="7.3">
     <option name="suggestChangeDefaultLanguageLevel" value="false" />
   </component>
+  <component name="PhpStanOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
   <component name="PhpUnit">
     <phpunit_settings>
       <PhpUnitSettings configuration_file_path="$PROJECT_DIR$/phpunit.xml.dist" custom_loader_path="$PROJECT_DIR$/vendor/autoload.php" use_configuration_file="true" />
     </phpunit_settings>
   </component>
-</project>
\ No newline at end of file
+  <component name="PsalmOptionsConfiguration">
+    <option name="transferred" value="true" />
+  </component>
+</project>
+
diff --git a/composer.json b/composer.json
index fd0df87..7aa0396 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "php": "^7.3 || ^8.0",
         "ext-openssl": "*",
         "ext-tokenizer": "*",
-        "nikic/php-parser": "^4.10"
+        "nikic/php-parser": "^5.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",
diff --git a/src/MonkeyPatchManager.php b/src/MonkeyPatchManager.php
index 5fa392b..5006cc0 100644
--- a/src/MonkeyPatchManager.php
+++ b/src/MonkeyPatchManager.php
@@ -45,7 +45,10 @@ class MonkeyPatchManager
     public static $debug = false;
 
     /** @var int */
-    private static $php_parser = ParserFactory::PREFER_PHP5;
+    private static $php_version_major = 5;
+
+    /** @var int */
+    private static $php_version_minor = 1;
 
     /**
      * The path to the log file if `$debug` is true.
@@ -94,9 +97,28 @@ public static function getExitExceptionClassname(): string
         return self::$exit_exception_classname;
     }
 
-    public static function getPhpParser(): int
+    public static function getPhpVersionMajor(): int
+    {
+        return self::$php_version_major;
+    }
+
+    public static function getPhpVersionMinor(): int
     {
-        return self::$php_parser;
+        return self::$php_version_minor;
+    }
+
+    /**
+     * @param array<string, mixed> $config
+     */
+    protected static function setPhpVersion(array $config): void
+    {
+        if (isset($config['php_version_major'])) {
+            self::$php_version_major = $config['php_version_major'];
+        }
+
+        if (isset($config['php_version_minor'])) {
+            self::$php_version_minor = $config['php_version_minor'];
+        }
     }
 
     /**
@@ -155,11 +177,7 @@ protected static function setPaths(array $config): void
     public static function init(array $config): void
     {
         self::setDebug($config);
-
-        if (isset($config['php_parser'])) {
-            self::$php_parser = constant('PhpParser\ParserFactory::' . $config['php_parser']);
-        }
-
+        self::setPhpVersion($config);
         self::setDir($config);
         self::setPaths($config);
 
diff --git a/src/Patcher/AbstractPatcher.php b/src/Patcher/AbstractPatcher.php
index 61dd62c..644bf55 100644
--- a/src/Patcher/AbstractPatcher.php
+++ b/src/Patcher/AbstractPatcher.php
@@ -14,10 +14,10 @@
 namespace Kenjis\MonkeyPatch\Patcher;
 
 use Kenjis\MonkeyPatch\MonkeyPatchManager;
-use PhpParser\Lexer;
 use PhpParser\NodeTraverser;
 use PhpParser\NodeVisitorAbstract;
 use PhpParser\ParserFactory;
+use PhpParser\PhpVersion;
 use PhpParser\PrettyPrinter;
 
 use function assert;
@@ -38,10 +38,10 @@ public function patch(string $source): array
         $patched = false;
 
         $parser = (new ParserFactory())
-            ->create(
-                MonkeyPatchManager::getPhpParser(),
-                new Lexer(
-                    ['usedAttributes' => ['startTokenPos', 'endTokenPos']]
+            ->createForVersion(
+                PhpVersion::fromComponents(
+                    MonkeyPatchManager::getPhpVersionMajor(),
+                    MonkeyPatchManager::getPhpVersionMinor()
                 )
             );
         $traverser = new NodeTraverser();
diff --git a/src/bootstrap.php b/src/bootstrap.php
index aedd833..296ac82 100644
--- a/src/bootstrap.php
+++ b/src/bootstrap.php
@@ -32,8 +32,9 @@ class_alias(FuncProxy::class, '__FuncProxy__');
     // If you want debug log, set `debug` true, and optionally you can set the log file path
     'debug' => true,
     'log_file' => __DIR__ . '/../tmp/monkey-patch-debug.log',
-    // PHP Parser: PREFER_PHP7, PREFER_PHP5, ONLY_PHP7, ONLY_PHP5
-    'php_parser' => 'PREFER_PHP7',
+    // PHP version
+    'php_version_major' => 7,
+    'php_version_minor' => 0,
     // Project root directory
     'root_dir' => __DIR__ . '/../',
     'cache_dir' => __DIR__ . '/../tmp/cache',