diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cb75479..d31ac9b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [4.0.0] - 2021-11-25
+
 ## [4.0.0-rc.0] - 2021-10-13
 
 ### Added
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index a4840b7e..45060075 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -98,7 +98,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '4.0.0-rc.0';
+    const SMARTY_VERSION = '4.0.0';
     /**
      * define variable scopes
      */