diff --git a/src/Resources/DependencyInjection/Configuration.php b/src/Resources/DependencyInjection/Configuration.php
index 59a62c3..57db5a8 100644
--- a/src/Resources/DependencyInjection/Configuration.php
+++ b/src/Resources/DependencyInjection/Configuration.php
@@ -9,8 +9,12 @@ class Configuration implements ConfigurationInterface
 {
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('http_client');
+        $treeBuilder = new TreeBuilder('http_client');
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            $rootNode = $treeBuilder->root('http_client');
+        }
 
         $rootNode
             ->children()