diff --git a/admin/starter/composer.json b/admin/starter/composer.json
index 0b3a889757bc..b84684d82a4f 100644
--- a/admin/starter/composer.json
+++ b/admin/starter/composer.json
@@ -20,7 +20,8 @@
     },
     "autoload": {
         "psr-4": {
-            "App\\": "app/"
+            "App\\": "app/",
+            "Config\\": "app/Config"
         },
         "exclude-from-classmap": [
             "**/Database/Migrations/**"
diff --git a/user_guide_src/source/concepts/autoloader.rst b/user_guide_src/source/concepts/autoloader.rst
index 2829e1240929..6391148323c8 100644
--- a/user_guide_src/source/concepts/autoloader.rst
+++ b/user_guide_src/source/concepts/autoloader.rst
@@ -93,6 +93,9 @@ Config files are namespaced in the ``Config`` namespace, not in ``App\Config`` a
 expect. This allows the core system files to always be able to locate them, even when the application
 namespace has changed.
 
+.. note:: Since v4.5.3 appstarter, the ``Config\\`` namespace has been added to
+    **composer.json**'s ``autoload.psr-4``.
+
 Changing App Namespace
 ----------------------