diff --git a/Describer/DefaultDescriber.php b/Describer/DefaultDescriber.php
index 2c803aa..0b7c8ff 100644
--- a/Describer/DefaultDescriber.php
+++ b/Describer/DefaultDescriber.php
@@ -38,7 +38,7 @@ final class DefaultDescriber implements DescriberInterface
                 $operation = $path->getOperation($method);
 
                 // Default Response
-                if (0 === count($operation->getResponses())) {
+                if (0 === iterator_count($operation->getResponses())) {
                     $defaultResponse = $operation->getResponses()->get('default');
                     $defaultResponse->setDescription('');
                 }
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index dee835c..5606cd4 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -5,17 +5,17 @@
 
     <services>
         <!-- Controllers -->
-        <service id="nelmio_api_doc.controller.swagger_ui" class="Nelmio\ApiDocBundle\Controller\SwaggerUiController">
+        <service id="nelmio_api_doc.controller.swagger_ui" class="Nelmio\ApiDocBundle\Controller\SwaggerUiController" public="true">
             <argument type="service" id="nelmio_api_doc.generator" />
             <argument type="service" id="twig" />
         </service>
 
-        <service id="nelmio_api_doc.controller.swagger" class="Nelmio\ApiDocBundle\Controller\DocumentationController">
+        <service id="nelmio_api_doc.controller.swagger" class="Nelmio\ApiDocBundle\Controller\DocumentationController" public="true">
             <argument type="service" id="nelmio_api_doc.generator" />
         </service>
 
         <!-- Swagger Spec Generator -->
-        <service id="nelmio_api_doc.generator" class="Nelmio\ApiDocBundle\ApiDocGenerator">
+        <service id="nelmio_api_doc.generator" class="Nelmio\ApiDocBundle\ApiDocGenerator" public="true">
             <argument type="collection" /> <!-- Describers -->
             <argument type="collection" /> <!-- Model Describers -->
         </service>
diff --git a/RouteDescriber/RouteMetadataDescriber.php b/RouteDescriber/RouteMetadataDescriber.php
index 68fe1e6..ed67dd2 100644
--- a/RouteDescriber/RouteMetadataDescriber.php
+++ b/RouteDescriber/RouteMetadataDescriber.php
@@ -40,7 +40,7 @@ final class RouteMetadataDescriber implements RouteDescriberInterface
                 }
 
                 if (isset($requirements[$pathVariable])) {
-                    $parameter->setFormat($requirements[$pathVariable]);
+                    $parameter->setPattern($requirements[$pathVariable]);
                 }
             }
         }
diff --git a/Tests/Functional/FunctionalTest.php b/Tests/Functional/FunctionalTest.php
index 5d0380e..f72b5fe 100644
--- a/Tests/Functional/FunctionalTest.php
+++ b/Tests/Functional/FunctionalTest.php
@@ -113,7 +113,8 @@ class FunctionalTest extends WebTestCase
         $parameter = $parameters->get('user', 'path');
         $this->assertTrue($parameter->getRequired());
         $this->assertEquals('string', $parameter->getType());
-        $this->assertEquals('/foo/', $parameter->getFormat());
+        $this->assertEquals('/foo/', $parameter->getPattern());
+        $this->assertEmpty($parameter->getFormat());
     }
 
     public function testFOSRestAction()
diff --git a/composer.json b/composer.json
index 64c6e01..6d10ec7 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "7.0.*|7.1.*",
+        "php": "^7.0",
         "symfony/framework-bundle": "^3.2.5|^4.0",
         "symfony/property-info": "^3.1|^4.0",
         "exsyst/swagger": "~0.3",
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 18979b1..fb133f5 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -9,6 +9,7 @@
 >
     <php>
         <ini name="error_reporting" value="-1" />
+        <env name="SYMFONY_DEPRECATIONS_HELPER" value="weak_vendors" />
     </php>
 
     <testsuites>