diff --git a/CHANGELOG.md b/CHANGELOG.md
index f245bfd6b062..7837363ab950 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,24 @@
 # Changelog
 
+## [v4.2.12](https://github.com/codeigniter4/CodeIgniter4/tree/v4.2.12) (2023-01-09)
+[Full Changelog](https://github.com/codeigniter4/CodeIgniter4/compare/v4.2.11...v4.2.12)
+
+### Fixed Bugs
+* docs: fix request.rst by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7014
+* fix: `link_tag()` missing `type="application/rss+xml"` by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7022
+* fix: Request::getIPaddress() causes error on CLI by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7030
+* docs: fix upgrade_database.rst by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7036
+* fix: `spark migrate:status` shows incorrect filename when format is `Y_m_d_His_` by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7038
+* fix: Model::save() object when useAutoIncrement is disabled by @michalsn in https://github.com/codeigniter4/CodeIgniter4/pull/7042
+* fix: define of STDOUT in CLI init() method by @jozefrebjak in https://github.com/codeigniter4/CodeIgniter4/pull/7052
+* fix: change `getFile()` function of \CodeIgniter\Events\Events to static. by @ping-yee in https://github.com/codeigniter4/CodeIgniter4/pull/7046
+* fix: [Email] add fallback to use gethostname() by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7053
+* Fixing bug with legacy autoRoute when testing by @baycik in https://github.com/codeigniter4/CodeIgniter4/pull/7060
+
+### Refactoring
+* refactor: RequestTrait by rector by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7006
+* refactor: update sass output by @kenjis in https://github.com/codeigniter4/CodeIgniter4/pull/7026
+
 ## [v4.2.11](https://github.com/codeigniter4/CodeIgniter4/tree/v4.2.11) (2022-12-21)
 [Full Changelog](https://github.com/codeigniter4/CodeIgniter4/compare/v4.2.10...v4.2.11)
 
diff --git a/system/CodeIgniter.php b/system/CodeIgniter.php
index e7076c4ba167..79c9ebbf5eae 100644
--- a/system/CodeIgniter.php
+++ b/system/CodeIgniter.php
@@ -47,7 +47,7 @@ class CodeIgniter
     /**
      * The current version of CodeIgniter Framework
      */
-    public const CI_VERSION = '4.2.11';
+    public const CI_VERSION = '4.2.12';
 
     /**
      * App startup time.
diff --git a/user_guide_src/source/changelogs/v4.2.12.rst b/user_guide_src/source/changelogs/v4.2.12.rst
index 1b60f46dd481..d3239378f431 100644
--- a/user_guide_src/source/changelogs/v4.2.12.rst
+++ b/user_guide_src/source/changelogs/v4.2.12.rst
@@ -1,7 +1,7 @@
 Version 4.2.12
 ##############
 
-Release Date: Unreleased
+Release Date: January 9, 2023
 
 **4.2.12 release of CodeIgniter4**
 
diff --git a/user_guide_src/source/conf.py b/user_guide_src/source/conf.py
index 2c5f54865d00..89b2532c015d 100644
--- a/user_guide_src/source/conf.py
+++ b/user_guide_src/source/conf.py
@@ -26,7 +26,7 @@
 version = '4.2'
 
 # The full version, including alpha/beta/rc tags.
-release = '4.2.11'
+release = '4.2.12'
 
 # -- General configuration ---------------------------------------------------
 
diff --git a/user_guide_src/source/installation/upgrade_4212.rst b/user_guide_src/source/installation/upgrade_4212.rst
index 233f8881ce96..ff6005d641d3 100644
--- a/user_guide_src/source/installation/upgrade_4212.rst
+++ b/user_guide_src/source/installation/upgrade_4212.rst
@@ -23,5 +23,7 @@ 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:
 
-* app/Controllers/BaseController.php
-* composer.json
+*   app/Config/Cache.php
+*   app/Config/Migrations.php
+*   app/Controllers/BaseController.php
+*   composer.json