diff --git a/src/Mage.php b/src/Mage.php
index f1b63134..a12c89e3 100644
--- a/src/Mage.php
+++ b/src/Mage.php
@@ -17,6 +17,6 @@
  */
 class Mage
 {
-    const VERSION = '4.x';
+    const VERSION = '4.0.0';
     const CODENAME = 'Discovery One';
 }