diff --git a/src/Taxus.php b/src/Taxus.php
index ba438f7..4c43f77 100644
--- a/src/Taxus.php
+++ b/src/Taxus.php
@@ -44,7 +44,12 @@ class Taxus
         return $this;
     }
 
-    public function granted($name, ...$arguments) : bool
+    /**
+     * @param $name
+     * @param ...$arguments
+     * @return bool|null Return TRUE if granted, FALSE if not and NULL if this call should be skipped
+     */
+    public function granted($name, ...$arguments) : null|bool
     {
         $name = $name instanceof \BackedEnum ? $name->value : $name;