diff --git a/src/AllowedFilter.php b/src/AllowedFilter.php
index 5285c722..c6157f57 100644
--- a/src/AllowedFilter.php
+++ b/src/AllowedFilter.php
@@ -118,7 +118,7 @@ public static function custom(string $name, Filter $filterClass, $internalName =
         return new static($name, $filterClass, $internalName);
     }
 
-    public function getFilterClass(): string
+    public function getFilterClass(): \Spatie\QueryBuilder\Filters\Filter
     {
         return $this->filterClass;
     }