diff --git a/user_guide_src/source/changelogs/v4.3.0.rst b/user_guide_src/source/changelogs/v4.3.0.rst
index e7aa306303b2..4a052f49bfc8 100644
--- a/user_guide_src/source/changelogs/v4.3.0.rst
+++ b/user_guide_src/source/changelogs/v4.3.0.rst
@@ -12,7 +12,18 @@ Release Date: Unreleased
 Highlights
 **********
 
-- TBD
+- Query Builder supports **upsert()**, **upsertBatch()**, **deleteBatch()** and
+  now ***batch()** methods can set data from a query
+  (*contributed by* `sclubricants <https://github.com/sclubricants>`_).
+  See `Query Builder`_.
+- Database Forge supports to **add indexes in the existing tables** and
+  **name indexes** (*contributed by* `sclubricants <https://github.com/sclubricants>`_).
+  See `Forge`_.
+- To make the default configuration more secure, the default Validation Rules
+  have been changed to **Strict Rules**.
+- When a database error occurs, the conditions that an exception is thrown and
+  the exception classes that can be thrown have been changed.
+  See :ref:`exceptions-when-database-errors-occur`.
 
 BREAKING
 ********
@@ -323,6 +334,7 @@ Changes
 
 - Config
     - All atomic type properties in ``Config`` classes have been typed.
+    - See :ref:`Upgrading <upgrade_430_config>` for information on changing the default values.
 - Changed the processing of Spark commands:
     - The ``CodeIgniter\CodeIgniter`` no longer handles Spark commands.
     - The ``CodeIgniter::isSparked()`` method has been removed.
diff --git a/user_guide_src/source/installation/upgrade_430.rst b/user_guide_src/source/installation/upgrade_430.rst
index c569d351fcd7..6852389a2b41 100644
--- a/user_guide_src/source/installation/upgrade_430.rst
+++ b/user_guide_src/source/installation/upgrade_430.rst
@@ -236,6 +236,8 @@ Content Changes
 The following files received significant changes (including deprecations or visual adjustments)
 and it is recommended that you merge the updated versions with your application:
 
+.. _upgrade_430_config:
+
 Config
 ------
 
@@ -258,6 +260,9 @@ Config
 - app/Config/Exceptions.php
     - Two additional public properties were added: ``$logDeprecations`` and ``$deprecationLogLevel``.
       See See :ref:`logging_deprecation_warnings` for details.
+- app/Config/Logger.php
+    - The property ``$threshold`` has been changed to ``9`` in other than ``production``
+      environment.
 - app/Config/Modules.php
     - The new property ``$composerPackages`` is added to limit Composer package Auto-Discovery for better
       performance.