diff --git a/app/Application.php b/app/Application.php
index 3084952f..fe078c37 100644
--- a/app/Application.php
+++ b/app/Application.php
@@ -15,7 +15,7 @@ class Application extends IlluminateApplication
      *
      * @link https://github.com/phanan/koel/releases
      */
-    public const KOEL_VERSION = 'v3.8.0';
+    public const KOEL_VERSION = 'v4.0.0';
 
     /**
      * We have merged public path and base path.