diff --git a/DependencyInjection/WebServiceExtension.php b/DependencyInjection/WebServiceExtension.php
index 17fb3ca..95dcb33 100644
--- a/DependencyInjection/WebServiceExtension.php
+++ b/DependencyInjection/WebServiceExtension.php
@@ -10,6 +10,8 @@
 
 namespace Bundle\WebServiceBundle\DependencyInjection;
 
+use Bundle\WebServiceBundle\Util\Assert;
+
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
@@ -48,12 +50,11 @@ class WebServiceExtension extends Extension
 
     protected function registerServiceDefinitionConfig(array $config, ContainerBuilder $configuration)
     {
-        if(!isset($config['name']))
-        {
-            throw new \InvalidArgumentException();
-        }
+        Assert::thatArgument('config.name', isset($config['name']));
+        Assert::thatArgument('config.namespace', isset($config['namespace']));
 
         $configuration->setParameter('webservice.definition.name', $config['name']);
+        $configuration->setParameter('webservice.definition.namespace', $config['namespace']);
         $configuration->setParameter('webservice.definition.resource', isset($config['resource']) ? $config['resource'] : null);
         $configuration->setParameter('webservice.definition.wsdl', isset($config['wsdl']) ? $config['wsdl'] : null);
     }
diff --git a/ServiceDefinition/Dumper/WsdlFileDumper.php b/ServiceDefinition/Dumper/WsdlFileDumper.php
index e691cbd..45746bf 100644
--- a/ServiceDefinition/Dumper/WsdlFileDumper.php
+++ b/ServiceDefinition/Dumper/WsdlFileDumper.php
@@ -24,28 +24,21 @@ use Zend\Soap\Wsdl;
  */
 class WsdlFileDumper extends FileDumper
 {
-    private $namespace;
-
-    public function __construct($file, $namespace)
-    {
-        parent::__construct($file);
-
-        Assert::thatArgumentNotNull('namespace', $namespace);
-
-        $this->namespace = $namespace;
-    }
+    private $definition;
 
     public function dumpServiceDefinition(ServiceDefinition $definition)
     {
         Assert::thatArgumentNotNull('definition', $definition);
 
-        $wsdl = new Wsdl($definition->getName(), $this->namespace);
+        $this->definition = $definition;
 
-        $port = $wsdl->addPortType($this->getPortTypeName($definition));
-        $binding = $wsdl->addBinding($this->getBindingName($definition), $this->getPortTypeName($definition));
+        $wsdl = new Wsdl($definition->getName(), $definition->getNamespace());
+
+        $port = $wsdl->addPortType($this->getPortTypeName());
+        $binding = $wsdl->addBinding($this->getBindingName(), $this->getPortTypeName());
 
         $wsdl->addSoapBinding($binding, 'document');
-        $wsdl->addService($this->getServiceName($definition), $this->getPortTypeName($definition), $this->getBindingName($definition), 'http://localhost/service/');
+        $wsdl->addService($this->getServiceName(), $this->getPortTypeName(), $this->getBindingName(), '');
 
         foreach($definition->getMethods() as $method)
         {
@@ -68,13 +61,13 @@ class WsdlFileDumper extends FileDumper
             $bindingInput = array(
                 'parts' => implode(' ', array_keys($requestParts)),
                 'use' => 'literal',
-                'namespace' => $this->namespace,
+                'namespace' => $definition->getNamespace(),
                 'encodingStyle' => 'http://schemas.xmlsoap.org/soap/encoding/',
             );
             $bindingOutput = array(
                 'parts' => implode(' ', array_keys($responseParts)),
                 'use' => 'literal',
-                'namespace' => $this->namespace,
+                'namespace' => $definition->getNamespace(),
                 'encodingStyle' => 'http://schemas.xmlsoap.org/soap/encoding/',
             );
 
@@ -83,21 +76,25 @@ class WsdlFileDumper extends FileDumper
         }
 
         $wsdl->dump($this->file);
+
+        $this->definition = null;
+
+        return $this->file;
     }
 
-    protected function getPortTypeName(ServiceDefinition $definition)
+    protected function getPortTypeName()
     {
-        return $definition->getName() . 'PortType';
+        return $this->definition->getName() . 'PortType';
     }
 
-    protected function getBindingName(ServiceDefinition $definition)
+    protected function getBindingName()
     {
-        return $definition->getName() . 'Binding';
+        return $this->definition->getName() . 'Binding';
     }
 
-    protected function getServiceName(ServiceDefinition $definition)
+    protected function getServiceName()
     {
-        return $definition->getName() . 'Service';
+        return $this->definition->getName() . 'Service';
     }
 
     protected function getRequestMessageName(Method $method)
@@ -112,6 +109,6 @@ class WsdlFileDumper extends FileDumper
 
     protected function getSoapOperationName(Method $method)
     {
-        return $this->namespace . $method->getName();
+        return $this->definition->getNamespace() . $method->getName();
     }
 }
diff --git a/ServiceDefinition/ServiceDefinition.php b/ServiceDefinition/ServiceDefinition.php
index e116372..b587b9e 100644
--- a/ServiceDefinition/ServiceDefinition.php
+++ b/ServiceDefinition/ServiceDefinition.php
@@ -19,6 +19,11 @@ class ServiceDefinition
      */
     private $name;
 
+    /**
+     * @var string
+     */
+    private $namespace;
+
     /**
      * @var \Bundle\WebServiceBundle\Util\Collection
      */
@@ -29,9 +34,10 @@ class ServiceDefinition
      */
     private $headers;
 
-    public function __construct($name = null, array $methods = array(), array $headers = array())
+    public function __construct($name = null, $namespace = null, array $methods = array(), array $headers = array())
     {
         $this->setName($name);
+        $this->setNamespace($namespace);
         $this->setMethods($methods);
         $this->setHeaders($headers);
     }
@@ -52,6 +58,22 @@ class ServiceDefinition
         $this->name = $name;
     }
 
+    /**
+     * @return string
+     */
+    public function getNamespace()
+    {
+        return $this->namespace;
+    }
+
+    /**
+     * @param string $namespace
+     */
+    public function setNamespace($namespace)
+    {
+        $this->namespace = $namespace;
+    }
+
     /**
      * @return \Bundle\WebServiceBundle\Util\Collection
      */