diff --git a/src/DependencyInjection/CommandBusConfiguration.php b/src/DependencyInjection/CommandBusConfiguration.php
index 464b50f..807f341 100644
--- a/src/DependencyInjection/CommandBusConfiguration.php
+++ b/src/DependencyInjection/CommandBusConfiguration.php
@@ -18,7 +18,14 @@ public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder($this->alias);
 
-        $rootNode = $treeBuilder->root($this->alias);
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            // Symfony 4.2 +
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // Symfony 4.1 and below
+            $rootNode = $treeBuilder->root($this->alias);
+        }
+
         $rootNode
             ->addDefaultsIfNotSet()
             ->children()
diff --git a/src/DependencyInjection/DoctrineOrmBridgeConfiguration.php b/src/DependencyInjection/DoctrineOrmBridgeConfiguration.php
index 8750bbf..ee43d99 100644
--- a/src/DependencyInjection/DoctrineOrmBridgeConfiguration.php
+++ b/src/DependencyInjection/DoctrineOrmBridgeConfiguration.php
@@ -18,7 +18,13 @@ public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder($this->alias);
 
-        $rootNode = $treeBuilder->root($this->alias);
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            // Symfony 4.2 +
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // Symfony 4.1 and below
+            $rootNode = $treeBuilder->root($this->alias);
+        }
 
         $rootNode
             ->addDefaultsIfNotSet()
diff --git a/src/DependencyInjection/EventBusConfiguration.php b/src/DependencyInjection/EventBusConfiguration.php
index 985cd22..4791142 100644
--- a/src/DependencyInjection/EventBusConfiguration.php
+++ b/src/DependencyInjection/EventBusConfiguration.php
@@ -18,7 +18,14 @@ public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder($this->alias);
 
-        $rootNode = $treeBuilder->root($this->alias);
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            // Symfony 4.2 +
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // Symfony 4.1 and below
+            $rootNode = $treeBuilder->root($this->alias);
+        }
+
         $rootNode
             ->addDefaultsIfNotSet()
             ->children()