diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 0b5d88e..ae2fc06 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -19,7 +19,21 @@ class Configuration implements ConfigurationInterface
     public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('exsyst_api_doc');
+        $treeBuilder
+            ->root('exsyst_api_doc')
+            ->children()
+                ->arrayNode('routes')
+                    ->info('Filter the routes that are documented')
+                    ->addDefaultsIfNotSet()
+                    ->children()
+                        ->arrayNode('path_patterns')
+                            ->example(array('^/api', '^/api(?!/admin)'))
+                            ->prototype('scalar')->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end();
+
 
         return $treeBuilder;
     }
diff --git a/DependencyInjection/EXSystApiDocExtension.php b/DependencyInjection/EXSystApiDocExtension.php
index 87758eb..22f4eb4 100644
--- a/DependencyInjection/EXSystApiDocExtension.php
+++ b/DependencyInjection/EXSystApiDocExtension.php
@@ -40,6 +40,10 @@ class EXSystApiDocExtension extends Extension
 
         $loader->load('services.xml');
 
+        // Filter routes
+        $routeCollectionBuilder = $container->getDefinition('exsyst_api_doc.describers.route.filtered_route_collection_builder');
+        $routeCollectionBuilder->replaceArgument(0, $config['routes']['path_patterns']);
+
         // Import services needed for each library
         if (class_exists(ApiDoc::class)) {
             $loader->load('nelmio_apidoc.xml');
diff --git a/Describer/RouteDescriber.php b/Describer/RouteDescriber.php
index f8e884e..2e67430 100644
--- a/Describer/RouteDescriber.php
+++ b/Describer/RouteDescriber.php
@@ -17,25 +17,25 @@ use EXSyst\Component\Swagger\Swagger;
 use Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\Routing\Route;
-use Symfony\Component\Routing\RouterInterface;
+use Symfony\Component\Routing\RouteCollection;
 
 class RouteDescriber implements DescriberInterface
 {
     private $container;
-    private $router;
+    private $routeCollection;
     private $controllerNameParser;
     private $routeDescribers;
 
     /**
      * @param ContainerInterface        $container
-     * @param RouterInterface           $router
+     * @param RouteCollection           $routeCollection
      * @param ControllerNameParser      $controllerNameParser
      * @param RouteDescriberInterface[] $routeDescribers
      */
-    public function __construct(ContainerInterface $container, RouterInterface $router, ControllerNameParser $controllerNameParser, array $routeDescribers)
+    public function __construct(ContainerInterface $container, RouteCollection $routeCollection, ControllerNameParser $controllerNameParser, array $routeDescribers)
     {
         $this->container = $container;
-        $this->router = $router;
+        $this->routeCollection = $routeCollection;
         $this->controllerNameParser = $controllerNameParser;
         $this->routeDescribers = $routeDescribers;
     }
@@ -46,7 +46,7 @@ class RouteDescriber implements DescriberInterface
             return;
         }
 
-        foreach ($this->getRoutes() as $route) {
+        foreach ($this->routeCollection->all() as $route) {
             // if able to resolve the controller
             if ($method = $this->getReflectionMethod($route->getDefault('_controller'))) {
                 // Extract as many informations as possible about this route
@@ -57,16 +57,6 @@ class RouteDescriber implements DescriberInterface
         }
     }
 
-    /**
-     * Return a list of route to inspect.
-     *
-     * @return Route[] An array of routes
-     */
-    private function getRoutes()
-    {
-        return $this->router->getRouteCollection()->all();
-    }
-
     /**
      * Returns the ReflectionMethod for the given controller string.
      *
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index c352ee3..378ff9f 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -9,9 +9,23 @@
         </service>
 
         <!-- Extractors -->
+        <service id="exsyst_api_doc.describers.route.filtered_route_collection_builder" class="EXSyst\Bundle\ApiDocBundle\Routing\FilteredRouteCollectionBuilder" public="false">
+            <argument type="collection" /> <!-- Path patterns -->
+        </service>
+
+
         <service id="exsyst_api_doc.describers.route" class="EXSyst\Bundle\ApiDocBundle\Describer\RouteDescriber" public="false">
             <argument type="service" id="service_container" />
-            <argument type="service" id="router" />
+            <argument type="service">
+                <service class="Symfony\Component\Routing\RouteCollection">
+                    <factory service="exsyst_api_doc.describers.route.filtered_route_collection_builder" method="filter" />
+                    <argument type="service">
+                        <service class="Symfony\Component\Routing\RouteCollection">
+                            <factory service="router" method="getRouteCollection" />
+                        </service>
+                    </argument>
+                </service>
+            </argument>
             <argument type="service" id="controller_name_converter" />
             <argument type="collection" />
 
diff --git a/Routing/FilteredRouteCollectionBuilder.php b/Routing/FilteredRouteCollectionBuilder.php
new file mode 100644
index 0000000..835d750
--- /dev/null
+++ b/Routing/FilteredRouteCollectionBuilder.php
@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of the ApiDocBundle package.
+ *
+ * (c) EXSyst
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace EXSyst\Bundle\ApiDocBundle\Routing;
+
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCollection;
+
+final class FilteredRouteCollectionBuilder
+{
+    private $pathPatterns;
+
+    public function __construct(array $pathPatterns = [])
+    {
+        $this->pathPatterns = $pathPatterns;
+    }
+
+    public function filter(RouteCollection $routes): RouteCollection
+    {
+        $filteredRoutes = new RouteCollection();
+        foreach ($routes->all() as $name => $route) {
+            if ($this->match($route)) {
+                $filteredRoutes->add($name, $route);
+            }
+        }
+
+        return $filteredRoutes;
+    }
+
+    private function match(Route $route): bool
+    {
+        foreach ($this->pathPatterns as $pathPattern) {
+            if (!preg_match('{'.$pathPattern.'}', $route->getPath())) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/Tests/Functional/Controller/ApiController.php b/Tests/Functional/Controller/ApiController.php
index 8fd84d8..4c50fc2 100644
--- a/Tests/Functional/Controller/ApiController.php
+++ b/Tests/Functional/Controller/ApiController.php
@@ -14,6 +14,9 @@ namespace EXSyst\Bundle\ApiDocBundle\Tests\Functional\Controller;
 use Nelmio\ApiDocBundle\Annotation\ApiDoc;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
 
+/**
+ * @Route("/api")
+ */
 class ApiController
 {
     /**
@@ -45,4 +48,13 @@ class ApiController
     public function deprecatedAction()
     {
     }
+
+    /**
+     * This action is not documented. It is excluded by the config.
+     *
+     * @Route("/admin", methods={"GET"})
+     */
+    public function adminAction()
+    {
+    }
 }
diff --git a/Tests/Functional/Controller/UndocumentedController.php b/Tests/Functional/Controller/UndocumentedController.php
new file mode 100644
index 0000000..e0a2c5d
--- /dev/null
+++ b/Tests/Functional/Controller/UndocumentedController.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the ApiDocBundle package.
+ *
+ * (c) EXSyst
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace EXSyst\Bundle\ApiDocBundle\Tests\Functional\Controller;
+
+use Nelmio\ApiDocBundle\Annotation\ApiDoc;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+
+class UndocumentedController
+{
+    /**
+     * This path is excluded by the config (only /api allowed).
+     *
+     * @Route("/undocumented", methods={"GET"})
+     */
+    public function undocumentedAction()
+    {
+    }
+}
diff --git a/Tests/Functional/FunctionalTest.php b/Tests/Functional/FunctionalTest.php
index df8e041..087cf33 100644
--- a/Tests/Functional/FunctionalTest.php
+++ b/Tests/Functional/FunctionalTest.php
@@ -15,9 +15,16 @@ use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
 
 class FunctionalTest extends WebTestCase
 {
+    public function testUndocumentedAction()
+    {
+        $paths = $this->getSwaggerDefinition()->getPaths();
+        $this->assertFalse($paths->has('/undocumented'));
+        $this->assertFalse($paths->has('/api/admin'));
+    }
+
     public function testUserAction()
     {
-        $operation = $this->getOperation('/test/{user}', 'get');
+        $operation = $this->getOperation('/api/test/{user}', 'get');
 
         $this->assertEquals(['https'], $operation->getSchemes());
         $this->assertEmpty($operation->getSummary());
@@ -35,7 +42,7 @@ class FunctionalTest extends WebTestCase
 
     public function testNelmioAction()
     {
-        $operation = $this->getOperation('/nelmio/{foo}', 'post');
+        $operation = $this->getOperation('/api/nelmio/{foo}', 'post');
 
         $this->assertEquals('This action is described.', $operation->getDescription());
         $this->assertNull($operation->getDeprecated());
@@ -47,7 +54,7 @@ class FunctionalTest extends WebTestCase
 
     public function testDeprecatedAction()
     {
-        $operation = $this->getOperation('/deprecated', 'get');
+        $operation = $this->getOperation('/api/deprecated', 'get');
 
         $this->assertEquals('This action is deprecated.', $operation->getSummary());
         $this->assertEquals('Please do not use this action.', $operation->getDescription());
diff --git a/Tests/Functional/TestKernel.php b/Tests/Functional/TestKernel.php
index 7b7b110..621becd 100644
--- a/Tests/Functional/TestKernel.php
+++ b/Tests/Functional/TestKernel.php
@@ -59,5 +59,12 @@ class TestKernel extends Kernel
             'test' => null,
             'validation' => null,
         ]);
+
+        // Filter routes
+        $c->loadFromExtension('exsyst_api_doc', [
+            'routes' => [
+                'path_patterns' => ['^/api(?!/admin)'],
+            ],
+        ]);
     }
 }