diff --git a/src/Bkwld/Croppa/URL.php b/src/Bkwld/Croppa/URL.php
index ed07580..df0e278 100644
--- a/src/Bkwld/Croppa/URL.php
+++ b/src/Bkwld/Croppa/URL.php
@@ -18,7 +18,7 @@ class URL {
      *
      * @var array
      */
-    private $config;
+    protected $config;
 
     /**
      * Inject dependencies