diff --git a/user_guide_src/source/changelogs/v4.3.0.rst b/user_guide_src/source/changelogs/v4.3.0.rst
index 889be19a89fc..660f167e0c91 100644
--- a/user_guide_src/source/changelogs/v4.3.0.rst
+++ b/user_guide_src/source/changelogs/v4.3.0.rst
@@ -260,6 +260,7 @@ Others
 - View Cells are now first-class citizens and can be located in the **app/Cells** directory. See :ref:`View Cells <app-cells>`.
 - Added ``Controlled Cells`` that provide more structure and flexibility to your View Cells. See :ref:`View Cells <controlled-cells>` for details.
 - Now you can specify Composer packages to auto-discover manually. See :ref:`Code Modules <modules-specify-composer-packages>`.
+- **Debug:** Kint has been updated to 5.0.1.
 
 Message Changes
 ***************
diff --git a/user_guide_src/source/installation/upgrade_430.rst b/user_guide_src/source/installation/upgrade_430.rst
index 63e685518bd7..56c4db00c5fc 100644
--- a/user_guide_src/source/installation/upgrade_430.rst
+++ b/user_guide_src/source/installation/upgrade_430.rst
@@ -33,13 +33,14 @@ The following files received significant changes and
 Config Files
 ============
 
-If you are using the following Mock Config classes in testing, you need to update the corresponding Config files in **app/Config**:
+- **app/Config/Kint.php** has been updated for Kint 5.0. You need to replace ``Kint\Renderer\Renderer`` with ``Kint\Renderer\AbstractRenderer`` and replace ``Renderer::SORT_FULL`` with ``AbstractRenderer::SORT_FULL``.
+- If you are using the following Mock Config classes in testing, you need to update the corresponding Config files in **app/Config**:
 
-- ``MockAppConfig`` (``Config\App``)
-- ``MockCLIConfig`` (``Config\App``)
-- ``MockSecurityConfig`` (``Config\Security``)
+    - ``MockAppConfig`` (``Config\App``)
+    - ``MockCLIConfig`` (``Config\App``)
+    - ``MockSecurityConfig`` (``Config\Security``)
 
-Add **types** to the properties in these Config classes. You may need to fix the property values to match the property types.
+- Add **types** to the properties in these Config classes. You may need to fix the property values to match the property types.
 
 Breaking Changes
 ****************