diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 64e3230..53a1347 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -12,8 +12,14 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $tb = new TreeBuilder();
-        $rootNode = $tb->root('enqueue_elastica');
+        
+        $tb = new TreeBuilder('enqueue_elastica');
+        if (method_exists($tb, 'getRootNode')) {
+            $rootNode = $tb->getRootNode();
+        } else {
+            // BC layer for symfony/config 4.1 and older
+            $rootNode = $tb->root('enqueue_elastica');
+        }
         $rootNode
             ->children()
                 ->booleanNode('enabled')->defaultValue(true)->end()