diff --git a/src/Field/Image.php b/src/Field/Image.php
index f26b4fc..4e85332 100644
--- a/src/Field/Image.php
+++ b/src/Field/Image.php
@@ -47,7 +47,7 @@ class Image extends BasicField implements FieldInterface
     /**
      * @var array
      */
-    protected $sizes = [];
+    public $sizes = [];
 
     /**
      * @var bool