diff --git a/Controller/DocumentationController.php b/Controller/DocumentationController.php
index 0450d3a..4374bb2 100644
--- a/Controller/DocumentationController.php
+++ b/Controller/DocumentationController.php
@@ -11,35 +11,33 @@
 
 namespace Nelmio\ApiDocBundle\Controller;
 
-use OpenApi\Annotations\OpenApi;
-use OpenApi\Annotations\Server;
-use Psr\Container\ContainerInterface;
+use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 
 final class DocumentationController
 {
-    private $generatorLocator;
+    /**
+     * @var RenderOpenApi
+     */
+    private $renderOpenApi;
 
-    public function __construct(ContainerInterface $generatorLocator)
+    public function __construct(RenderOpenApi $renderOpenApi)
     {
-        $this->generatorLocator = $generatorLocator;
+        $this->renderOpenApi = $renderOpenApi;
     }
 
     public function __invoke(Request $request, $area = 'default')
     {
-        if (!$this->generatorLocator->has($area)) {
+        try {
+            return JsonResponse::fromJsonString(
+                $this->renderOpenApi->render(RenderOpenApi::JSON, $area, [
+                    'server_url' => '' !== $request->getBaseUrl() ? $request->getSchemeAndHttpHost().$request->getBaseUrl() : null,
+                ])
+            );
+        } catch (InvalidArgumentException $e) {
             throw new BadRequestHttpException(sprintf('Area "%s" is not supported as it isn\'t defined in config.', $area));
         }
-
-        /** @var OpenApi $spec */
-        $spec = $this->generatorLocator->get($area)->generate();
-
-        if ('' !== $request->getBaseUrl()) {
-            $spec->servers = [new Server(['url' => $request->getSchemeAndHttpHost().$request->getBaseUrl()])];
-        }
-
-        return new JsonResponse($spec);
     }
 }
diff --git a/Render/Json/JsonOpenApiRenderer.php b/Render/Json/JsonOpenApiRenderer.php
index 09af9e1..a5da3c9 100644
--- a/Render/Json/JsonOpenApiRenderer.php
+++ b/Render/Json/JsonOpenApiRenderer.php
@@ -14,6 +14,7 @@ namespace Nelmio\ApiDocBundle\Render\Json;
 use Nelmio\ApiDocBundle\Render\OpenApiRenderer;
 use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use OpenApi\Annotations\OpenApi;
+use OpenApi\Annotations\Server;
 
 class JsonOpenApiRenderer implements OpenApiRenderer
 {
@@ -25,10 +26,15 @@ class JsonOpenApiRenderer implements OpenApiRenderer
     public function render(OpenApi $spec, array $options = []): string
     {
         $options += [
+            'server_url' => null,
             'no-pretty' => false,
         ];
         $flags = $options['no-pretty'] ? 0 : JSON_PRETTY_PRINT;
 
+        if ($options['server_url']) {
+            $spec->servers = [new Server(['url' => $options['server_url']])];
+        }
+
         return json_encode($spec, $flags);
     }
 }
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index d452034..3caaba4 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -18,7 +18,7 @@
         <service id="nelmio_api_doc.controller.swagger" alias="nelmio_api_doc.controller.swagger_json" public="true" />
 
         <service id="nelmio_api_doc.controller.swagger_json" class="Nelmio\ApiDocBundle\Controller\DocumentationController" public="true">
-            <argument type="service" id="nelmio_api_doc.generator_locator" />
+            <argument type="service" id="nelmio_api_doc.render_docs" />
         </service>
 
         <service id="nelmio_api_doc.controller.swagger_yaml" class="Nelmio\ApiDocBundle\Controller\YamlDocumentationController" public="true">