diff --git a/docs/composer/plugin/d4d/index.md b/docs/composer/plugin/d4d/index.md
index 602ad5f8126908fca81413b7d5d159bced67cb2f..bef8b96e5974bef66380b3c21943518ec6fd8705 100644
--- a/docs/composer/plugin/d4d/index.md
+++ b/docs/composer/plugin/d4d/index.md
@@ -230,6 +230,9 @@ docker4drupal:
   php:
     version: '7.4'
     xdebug: 1
+  dbserver:
+    type: 'mariadb'
+    version: '10.5'
   webserver:
     type: apache
   varnish: