diff --git a/user_guide_src/source/changelogs/v4.3.0.rst b/user_guide_src/source/changelogs/v4.3.0.rst
index ed6047cd320e..5911f1686568 100644
--- a/user_guide_src/source/changelogs/v4.3.0.rst
+++ b/user_guide_src/source/changelogs/v4.3.0.rst
@@ -335,6 +335,7 @@ Message Changes
 
 - Updated English language strings to be more consistent.
 - Added ``CLI.generator.className.cell`` and ``CLI.generator.viewName.cell``.
+- Added **en/Errors.php** file.
 
 Changes
 *******
diff --git a/user_guide_src/source/installation/upgrade_430.rst b/user_guide_src/source/installation/upgrade_430.rst
index fb93b74c782b..396b45b25f60 100644
--- a/user_guide_src/source/installation/upgrade_430.rst
+++ b/user_guide_src/source/installation/upgrade_430.rst
@@ -325,6 +325,17 @@ Config
 - app/Config/Validation.php
     - The default Validation Rules have been changed to Strict Rules for better security. See :ref:`validation-traditional-and-strict-rules`.
 
+View Files
+----------
+
+The following view files have been changed to HTML5 compatible tags.
+Also, error messages are now defined in the **Errors** language file.
+
+- app/Views/errors/html/error_404.php
+- app/Views/errors/html/error_exception.php
+- app/Views/errors/html/production.php
+- app/Views/welcome_message.php
+
 All Changes
 ===========