diff --git a/lib/Pico.php b/lib/Pico.php
index 0bab820..e38a628 100644
--- a/lib/Pico.php
+++ b/lib/Pico.php
@@ -69,7 +69,7 @@ class Pico
      *
      * @var int
      */
-    const API_VERSION = 3;
+    const API_VERSION = 4;
 
     /**
      * Sort files in alphabetical ascending order