diff --git a/formwork/src/Traits/SingletonTrait.php b/formwork/src/Traits/SingletonTrait.php
index 74bf6b98..cbde8860 100644
--- a/formwork/src/Traits/SingletonTrait.php
+++ b/formwork/src/Traits/SingletonTrait.php
@@ -15,6 +15,8 @@ trait SingletonTrait
 
     /**
      * Return self instance
+     *
+     * @return static
      */
     public static function instance(): self
     {