diff --git a/Twig/MixExtension.php b/Twig/MixExtension.php
index ddd50b5..f7d23ab 100644
--- a/Twig/MixExtension.php
+++ b/Twig/MixExtension.php
@@ -23,7 +23,7 @@ public function __construct($webDir)
     }
 
     /**
-     * @return array
+     * @return \Twig_SimpleFunction[]
      */
     public function getFunctions()
     {
@@ -33,7 +33,7 @@ public function getFunctions()
     }
 
     /**
-     * @param $asset
+     * @param string $asset
      *
      * @throws \Exception
      *