diff --git a/Controller/DocumentationController.php b/Controller/DocumentationController.php
index 1c218e4..5129d04 100644
--- a/Controller/DocumentationController.php
+++ b/Controller/DocumentationController.php
@@ -13,6 +13,7 @@ namespace Nelmio\ApiDocBundle\Controller;
 
 use Nelmio\ApiDocBundle\ApiDocGenerator;
 use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
 
 final class DocumentationController
 {
@@ -23,8 +24,13 @@ final class DocumentationController
         $this->apiDocGenerator = $apiDocGenerator;
     }
 
-    public function __invoke()
+    public function __invoke(Request $request)
     {
-        return new JsonResponse($this->apiDocGenerator->generate()->toArray());
+        $spec = $this->apiDocGenerator->generate()->toArray();
+        if ('' !== $request->getBaseUrl()) {
+            $spec['basePath'] = $request->getBaseUrl();
+        }
+
+        return new JsonResponse($spec);
     }
 }
diff --git a/Controller/SwaggerUiController.php b/Controller/SwaggerUiController.php
index 44ed7a2..f0febea 100644
--- a/Controller/SwaggerUiController.php
+++ b/Controller/SwaggerUiController.php
@@ -12,6 +12,7 @@
 namespace Nelmio\ApiDocBundle\Controller;
 
 use Nelmio\ApiDocBundle\ApiDocGenerator;
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
 final class SwaggerUiController
@@ -25,10 +26,15 @@ final class SwaggerUiController
         $this->twig = $twig;
     }
 
-    public function __invoke()
+    public function __invoke(Request $request)
     {
+        $spec = $this->apiDocGenerator->generate()->toArray();
+        if ('' !== $request->getBaseUrl()) {
+            $spec['basePath'] = $request->getBaseUrl();
+        }
+
         return new Response(
-            $this->twig->render('@NelmioApiDoc/SwaggerUi/index.html.twig', ['swagger_data' => ['spec' => $this->apiDocGenerator->generate()->toArray()]]),
+            $this->twig->render('@NelmioApiDoc/SwaggerUi/index.html.twig', ['swagger_data' => ['spec' => $spec]]),
             Response::HTTP_OK,
             ['Content-Type' => 'text/html']
         );
diff --git a/Describer/ApiPlatformDescriber.php b/Describer/ApiPlatformDescriber.php
index c243997..04a4863 100644
--- a/Describer/ApiPlatformDescriber.php
+++ b/Describer/ApiPlatformDescriber.php
@@ -13,25 +13,32 @@ namespace Nelmio\ApiDocBundle\Describer;
 
 use ApiPlatform\Core\Documentation\Documentation;
 use ApiPlatform\Core\Swagger\Serializer\DocumentationNormalizer;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+use Symfony\Component\Routing\RequestContext;
 
 final class ApiPlatformDescriber extends ExternalDocDescriber
 {
-    public function __construct(Documentation $documentation, DocumentationNormalizer $normalizer, bool $overwrite = false)
+    public function __construct(Documentation $documentation, DocumentationNormalizer $normalizer, UrlGeneratorInterface $urlGenerator)
     {
-        parent::__construct(function () use ($documentation, $normalizer) {
-            $documentation = (array) $normalizer->normalize($documentation);
-            // Remove base path
-            if (isset($documentation['basePath'])) {
-                $paths = [];
-                foreach ($documentation['paths'] as $path => $value) {
-                    $paths['/'.ltrim($documentation['basePath'].'/'.ltrim($path, '/'), '/')] = $value;
-                }
-
-                unset($documentation['basePath']);
-                $documentation['paths'] = $paths;
+        parent::__construct(function () use ($documentation, $normalizer, $urlGenerator) {
+            $baseContext = $urlGenerator->getContext();
+            $urlGenerator->setContext(new RequestContext());
+            try {
+                $basePath = $urlGenerator->generate('api_entrypoint');
+            } finally {
+                $urlGenerator->setContext($baseContext);
             }
 
+            $documentation = (array) $normalizer->normalize($documentation);
+            unset($documentation['basePath']);
+
+            foreach ($documentation['paths'] as $path => $value) {
+                $paths['/'.ltrim($basePath.'/'.ltrim($path, '/'), '/')] = $value;
+            }
+
+            $documentation['paths'] = $paths;
+
             return $documentation;
-        }, $overwrite);
+        });
     }
 }
diff --git a/Resources/config/api_platform.xml b/Resources/config/api_platform.xml
index e52e283..0d0b05b 100644
--- a/Resources/config/api_platform.xml
+++ b/Resources/config/api_platform.xml
@@ -7,6 +7,7 @@
         <service id="nelmio_api_doc.describers.api_platform" class="Nelmio\ApiDocBundle\Describer\ApiPlatformDescriber" public="false">
             <argument type="service" id="nelmio_api_doc.describers.api_platform.documentation" />
             <argument type="service" id="api_platform.swagger.normalizer.documentation" />
+            <argument type="service" id="router" />
 
             <tag name="nelmio_api_doc.describer" priority="-100" />
         </service>
diff --git a/Tests/Functional/SwaggerUiTest.php b/Tests/Functional/SwaggerUiTest.php
index b294c33..c8761ac 100644
--- a/Tests/Functional/SwaggerUiTest.php
+++ b/Tests/Functional/SwaggerUiTest.php
@@ -13,28 +13,38 @@ namespace Nelmio\ApiDocBundle\Tests\Functional;
 
 class SwaggerUiTest extends WebTestCase
 {
+    protected static function createClient(array $options = [], array $server = [])
+    {
+        return parent::createClient([], ['PHP_SELF' => '/app_dev.php/docs', 'SCRIPT_FILENAME' => '/var/www/app/web/app_dev.php']);
+    }
+
     public function testSwaggerUi()
     {
         $client = self::createClient();
-        $crawler = $client->request('GET', '/docs/');
+        $crawler = $client->request('GET', '/app_dev.php/docs/');
 
         $response = $client->getResponse();
         $this->assertEquals(200, $response->getStatusCode());
         $this->assertEquals('text/html; charset=UTF-8', $response->headers->get('Content-Type'));
 
-        $swaggerUiSpec = json_decode($crawler->filterXPath('//script[@id="swagger-data"]')->text(), true);
-        $this->assertEquals($this->getSwaggerDefinition()->toArray(), $swaggerUiSpec['spec']);
+        $expected = $this->getSwaggerDefinition()->toArray();
+        $expected['basePath'] = '/app_dev.php';
+
+        $this->assertEquals($expected, json_decode($crawler->filterXPath('//script[@id="swagger-data"]')->text(), true)['spec']);
     }
 
     public function testJsonDocs()
     {
         $client = self::createClient();
-        $crawler = $client->request('GET', '/docs.json');
+        $crawler = $client->request('GET', '/app_dev.php/docs.json');
 
         $response = $client->getResponse();
         $this->assertEquals(200, $response->getStatusCode());
         $this->assertEquals('application/json', $response->headers->get('Content-Type'));
 
-        $this->assertEquals($this->getSwaggerDefinition()->toArray(), json_decode($response->getContent(), true));
+        $expected = $this->getSwaggerDefinition()->toArray();
+        $expected['basePath'] = '/app_dev.php';
+
+        $this->assertEquals($expected, json_decode($response->getContent(), true));
     }
 }