diff --git a/CHANGELOG.md b/CHANGELOG.md
index aad2d034..fb4bfe1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] - yyyy-mm-dd
+## [5.5.3] - 2023-10-11
 
 - Fix crash on `IntersectionType` (intersection types)
 
diff --git a/src/Doctum.php b/src/Doctum.php
index d1bd8637..f6a2755f 100644
--- a/src/Doctum.php
+++ b/src/Doctum.php
@@ -53,7 +53,7 @@ class Doctum implements ArrayAccess
     public const VERSION_MAJOR = 5;
     public const VERSION_MINOR = 5;
     public const VERSION_PATCH = 3;
-    public const IS_DEV        = true;
+    public const IS_DEV        = false;
 
     //@phpstan-ignore-next-line
     public const VERSION = self::VERSION_MAJOR . '.' . self::VERSION_MINOR . '.' . self::VERSION_PATCH . (self::IS_DEV ? '-dev' : '');