diff --git a/src/Analyzer/FileParserFactory.php b/src/Analyzer/FileParserFactory.php
index e8c3b93f..1755c660 100644
--- a/src/Analyzer/FileParserFactory.php
+++ b/src/Analyzer/FileParserFactory.php
@@ -9,13 +9,15 @@
 
 class FileParserFactory
 {
-    public static function createFileParser(TargetPhpVersion $targetPhpVersion, bool $parseCustomAnnotations = true): FileParser
-    {
+    public static function createFileParser(
+        TargetPhpVersion $targetPhpVersion = null,
+        bool $parseCustomAnnotations = true
+    ): FileParser {
         return new FileParser(
             new NodeTraverser(),
             new FileVisitor(new ClassDescriptionBuilder()),
             new NameResolver(null, ['parseCustomAnnotations' => $parseCustomAnnotations]),
-            $targetPhpVersion
+            $targetPhpVersion ?? TargetPhpVersion::create()
         );
     }
 }
diff --git a/src/CLI/TargetPhpVersion.php b/src/CLI/TargetPhpVersion.php
index 8ec80100..3f033afb 100644
--- a/src/CLI/TargetPhpVersion.php
+++ b/src/CLI/TargetPhpVersion.php
@@ -26,7 +26,7 @@ private function __construct(?string $version)
         $this->version = $version;
     }
 
-    public static function create(?string $version): self
+    public static function create(string $version = null): self
     {
         if (null === $version) {
             return new self(phpversion());