diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index c61d6944..5e4dba45 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -194,6 +194,10 @@ private function createPersistenceNode(): NodeDefinition
                 // In-memory persistence
                 ->scalarNode('in_memory')
                 ->end()
+                // Extensibility point
+                ->scalarNode('custom')
+                    ->cannotBeEmpty()
+                ->end()
             ->end()
         ;
 
diff --git a/src/DependencyInjection/LeagueOAuth2ServerExtension.php b/src/DependencyInjection/LeagueOAuth2ServerExtension.php
index dcff3006..4f091fc7 100644
--- a/src/DependencyInjection/LeagueOAuth2ServerExtension.php
+++ b/src/DependencyInjection/LeagueOAuth2ServerExtension.php
@@ -238,7 +238,12 @@ private function configurePersistence(LoaderInterface $loader, ContainerBuilder
                 $loader->load('storage/doctrine.php');
                 $this->configureDoctrinePersistence($container, $config, $persistenceConfig);
                 break;
+            case 'custom':
+                $persistenceMethod = $persistenceConfig;
+                break;
         }
+
+        $container->setParameter('league.oauth2_server.persistence.method', $persistenceMethod);
     }
 
     private function configureDoctrinePersistence(ContainerBuilder $container, array $config, array $persistenceConfig): void