diff --git a/src/EnumValueResolver.php b/src/EnumValueResolver.php
index 1f2acff..84d7c6d 100644
--- a/src/EnumValueResolver.php
+++ b/src/EnumValueResolver.php
@@ -26,7 +26,7 @@ public static function getValueFromInstance(UnitEnum|BackedEnum $enum): int|stri
         return $enum->name;
     }
 
-    protected static function throwOrNull(mixed $name, bool $throw = true): null
+    protected static function throwOrNull(mixed $name, bool $throw = true): mixed
     {
         if ($throw) {
             throw static::invalidValueException($name);