diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 8360011..916e1ca 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -141,10 +141,7 @@ class Configuration implements ConfigurationInterface
                 ->children()
                     ->arrayNode('settings')
                     ->useAttributeAsKey('key')
-                    ->prototype('array')
-                        ->useAttributeAsKey('key')
-                            ->prototype('scalar')->end()
-                        ->end()
+                    ->prototype('scalar')->end()
                     ->end()
                 ->end()
                 ->fixXmlConfig('connection')
@@ -239,10 +236,7 @@ class Configuration implements ConfigurationInterface
                     ->children()
                         ->arrayNode('settings')
                         ->useAttributeAsKey('key')
-                        ->prototype('array')
-                            ->useAttributeAsKey('key')
-                            ->prototype('scalar')
-                        ->end()
+                        ->prototype('scalar')->end()
                     ->end()
                 ->end()
         ;