diff --git a/src/Plugin.php b/src/Plugin.php
index 6f5f01a..4bf7388 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -20,6 +20,7 @@ final class Plugin implements PluginInterface, EventSubscriberInterface
 
 /**
  * This class is generated by phpstan/extension-installer.
+ * @internal
  */
 final class GeneratedConfig
 {