diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 5338402b..ee6fc2f6 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -29,8 +29,14 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('sensio_framework_extra', 'array');
+        $treeBuilder = new TreeBuilder('sensio_framework_extra');
+
+	    if (method_exists($treeBuilder, 'getRootNode')) {
+		    $rootNode = $treeBuilder->getRootNode();
+	    } else {
+		    // BC layer for symfony/config 4.1 and older
+		    $rootNode = $treeBuilder->root('sensio_framework_extra');
+	    }
 
         $rootNode
             ->children()