diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d71e1792fe5..9351b205e637 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,28 @@
 # Changelog
 
+## [v4.5.3](https://github.com/codeigniter4/CodeIgniter4/tree/v4.5.3) (2024-06-25)
+[Full Changelog](https://github.com/codeigniter4/CodeIgniter4/compare/v4.5.2...v4.5.3)
+
+### Fixed Bugs
+
+* fix: `RedisHandler::deleteMatching()` not deleting matching keys if cache prefix is used by @paulbalandan in https://github.com/codeigniter4/CodeIgniter4/pull/8952
+* fix: TypeError in DefinedRouteCollector::collect() by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8957
+* fix: `migrate:rollback -b` does not work due to TypeError by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8958
+* fix: [Validation] `if_exist` does not work with array data by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8959
+* chore: add `Config` namespace to appstarter autoload.psr4 by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8963
+* fix: `spark routes` may show BadRequestException when a route has a regexp by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8974
+* docs: fix incorrect description for route group filter by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8978
+* fix: return and param types of BaseConnection by @paulbalandan in https://github.com/codeigniter4/CodeIgniter4/pull/8983
+* fix: precedence of command classes with the same `$name` by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8898
+* fix: [OCI8] if conditions to build DSN by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8986
+* fix: [Auto Routing Improved] Default Method Fallback does not work with `$translateUriToCamelCase` by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8980
+* fix: `command()` may execute `rewrite.php` by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8995
+
+### Refactoring
+
+* refactor: BaseBuilder::orderBy() by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/8970
+* refactor: using phpunit 10 assertObjectHasNotProperty() and assertObjectHasProperty() by @samsonasik in https://github.com/codeigniter4/CodeIgniter4/pull/8991
+
 ## [v4.5.2](https://github.com/codeigniter4/CodeIgniter4/tree/v4.5.2) (2024-06-10)
 [Full Changelog](https://github.com/codeigniter4/CodeIgniter4/compare/v4.5.1...v4.5.2)
 
diff --git a/phpdoc.dist.xml b/phpdoc.dist.xml
index 141e99770713..5e5a31cb483a 100644
--- a/phpdoc.dist.xml
+++ b/phpdoc.dist.xml
@@ -10,7 +10,7 @@
         <output>api/build/</output>
         <cache>api/cache/</cache>
     </paths>
-    <version number="4.5.2">
+    <version number="4.5.3">
         <api format="php">
             <source dsn=".">
                 <path>system</path>
diff --git a/system/CodeIgniter.php b/system/CodeIgniter.php
index 2cd98ccbd7fa..95feae8160a1 100644
--- a/system/CodeIgniter.php
+++ b/system/CodeIgniter.php
@@ -56,7 +56,7 @@ class CodeIgniter
     /**
      * The current version of CodeIgniter Framework
      */
-    public const CI_VERSION = '4.5.2';
+    public const CI_VERSION = '4.5.3';
 
     /**
      * App startup time.
diff --git a/user_guide_src/source/changelogs/v4.5.3.rst b/user_guide_src/source/changelogs/v4.5.3.rst
index 10dbfe89a8f9..f52760d249d3 100644
--- a/user_guide_src/source/changelogs/v4.5.3.rst
+++ b/user_guide_src/source/changelogs/v4.5.3.rst
@@ -2,7 +2,7 @@
 Version 4.5.3
 #############
 
-Release Date: Unreleased
+Release Date: June 25, 2024
 
 **4.5.3 release of CodeIgniter4**
 
@@ -10,22 +10,6 @@ Release Date: Unreleased
     :local:
     :depth: 3
 
-********
-BREAKING
-********
-
-***************
-Message Changes
-***************
-
-*******
-Changes
-*******
-
-************
-Deprecations
-************
-
 **********
 Bugs Fixed
 **********
diff --git a/user_guide_src/source/conf.py b/user_guide_src/source/conf.py
index e5f3b2a71ccd..442a6f49e0d6 100644
--- a/user_guide_src/source/conf.py
+++ b/user_guide_src/source/conf.py
@@ -26,7 +26,7 @@
 version = '4.5'
 
 # The full version, including alpha/beta/rc tags.
-release = '4.5.2'
+release = '4.5.3'
 
 # -- General configuration ---------------------------------------------------
 
diff --git a/user_guide_src/source/installation/upgrade_453.rst b/user_guide_src/source/installation/upgrade_453.rst
index ab251db7c5de..9360b57728c0 100644
--- a/user_guide_src/source/installation/upgrade_453.rst
+++ b/user_guide_src/source/installation/upgrade_453.rst
@@ -12,18 +12,6 @@ Please refer to the upgrade instructions corresponding to your installation meth
     :local:
     :depth: 2
 
-**********************
-Mandatory File Changes
-**********************
-
-****************
-Breaking Changes
-****************
-
-*********************
-Breaking Enhancements
-*********************
-
 *************
 Project Files
 *************
@@ -44,7 +32,7 @@ and it is recommended that you merge the updated versions with your application:
 Config
 ------
 
-- @TODO
+- composer.json
 
 All Changes
 ===========
@@ -52,4 +40,4 @@ All Changes
 This is a list of all files in the **project space** that received changes;
 many will be simple comments or formatting that have no effect on the runtime:
 
-- @TODO
+- composer.json