diff --git a/src/Facades/Skeleton.php b/src/Facades/Skeleton.php
index 1fa9076e..571a498a 100644
--- a/src/Facades/Skeleton.php
+++ b/src/Facades/Skeleton.php
@@ -9,7 +9,7 @@
  */
 class Skeleton extends Facade
 {
-    protected static function getFacadeAccessor()
+    protected static function getFacadeAccessor(): string
     {
         return \VendorName\Skeleton\Skeleton::class;
     }