diff --git a/DependencyInjection/LoadExtractorParsersPass.php b/DependencyInjection/LoadExtractorParsersPass.php
new file mode 100644
index 0000000..4626496
--- /dev/null
+++ b/DependencyInjection/LoadExtractorParsersPass.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Nelmio\ApiDocBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\Config\FileLocator;
+
+/**
+ * Loads parsers to extract information from different libraries.
+ *
+ * They are only loaded when the corresponding library is installed and enabled.
+ */
+class LoadExtractorParsersPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+
+        // JMS may or may not be installed, if it is, load that config as well
+        if ($container->hasDefinition('jms_serializer.serializer')) {
+            $loader->load('services.jms.xml');
+        }
+
+        // forms may not be installed/enabled, if it is, load that config as well
+        if ($container->hasDefinition('form.factory')) {
+            $loader->load('services.form.xml');
+        }
+
+        // validation may not be installed/enabled, if it is, load that config as well
+        if ($container->hasDefinition('validator.mapping.class_metadata_factory')) {
+            $loader->load('services.validation.xml');
+        }
+    }
+}
diff --git a/DependencyInjection/RegisterJmsParserPass.php b/DependencyInjection/RegisterJmsParserPass.php
deleted file mode 100644
index 7c61460..0000000
--- a/DependencyInjection/RegisterJmsParserPass.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-namespace Nelmio\ApiDocBundle\DependencyInjection;
-
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
-use Symfony\Component\Config\FileLocator;
-
-class RegisterJmsParserPass implements CompilerPassInterface
-{
-    public function process(ContainerBuilder $container)
-    {
-        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
-
-        //JMS may or may not be installed, if it is, load that config as well
-        if ($container->hasDefinition('jms_serializer.serializer')) {
-            $loader->load('services.jms.xml');
-        }
-    }
-}
diff --git a/EventListener/RequestListener.php b/EventListener/RequestListener.php
index ef47e57..fedd4a9 100644
--- a/EventListener/RequestListener.php
+++ b/EventListener/RequestListener.php
@@ -14,7 +14,6 @@ namespace Nelmio\ApiDocBundle\EventListener;
 use Nelmio\ApiDocBundle\Extractor\ApiDocExtractor;
 use Nelmio\ApiDocBundle\Formatter\FormatterInterface;
 use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 
diff --git a/NelmioApiDocBundle.php b/NelmioApiDocBundle.php
index bfce996..a1851e7 100644
--- a/NelmioApiDocBundle.php
+++ b/NelmioApiDocBundle.php
@@ -4,10 +4,9 @@ namespace Nelmio\ApiDocBundle;
 
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Nelmio\ApiDocBundle\DependencyInjection\RegisterJmsParserPass;
+use Nelmio\ApiDocBundle\DependencyInjection\LoadExtractorParsersPass;
 use Nelmio\ApiDocBundle\DependencyInjection\RegisterExtractorParsersPass;
 use Nelmio\ApiDocBundle\DependencyInjection\ExtractorHandlerCompilerPass;
-use Nelmio\ApiDocBundle\DependencyInjection\ParserHandlerCompilerPass;
 
 class NelmioApiDocBundle extends Bundle
 {
@@ -15,7 +14,7 @@ class NelmioApiDocBundle extends Bundle
     {
         parent::build($container);
 
-        $container->addCompilerPass(new RegisterJmsParserPass());
+        $container->addCompilerPass(new LoadExtractorParsersPass());
         $container->addCompilerPass(new RegisterExtractorParsersPass());
         $container->addCompilerPass(new ExtractorHandlerCompilerPass());
     }
diff --git a/Resources/config/formatters.xml b/Resources/config/formatters.xml
index bbb404b..b50a2be 100644
--- a/Resources/config/formatters.xml
+++ b/Resources/config/formatters.xml
@@ -4,8 +4,6 @@
     xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
 
     <parameters>
-        <parameter key="nelmio_api_doc.parser.form_type_parser.class">Nelmio\ApiDocBundle\Parser\FormTypeParser</parameter>
-        <parameter key="nelmio_api_doc.parser.validation_parser.class">Nelmio\ApiDocBundle\Parser\ValidationParser</parameter>
         <parameter key="nelmio_api_doc.formatter.abstract_formatter.class">Nelmio\ApiDocBundle\Formatter\AbstractFormatter</parameter>
         <parameter key="nelmio_api_doc.formatter.markdown_formatter.class">Nelmio\ApiDocBundle\Formatter\MarkdownFormatter</parameter>
         <parameter key="nelmio_api_doc.formatter.simple_formatter.class">Nelmio\ApiDocBundle\Formatter\SimpleFormatter</parameter>
@@ -14,14 +12,6 @@
     </parameters>
 
     <services>
-        <service id="nelmio_api_doc.parser.form_type_parser" class="%nelmio_api_doc.parser.form_type_parser.class%">
-            <argument type="service" id="form.factory" />
-            <tag name="nelmio_api_doc.extractor.parser" />
-        </service>
-        <service id="nelmio_api_doc.parser.validation_parser" class="%nelmio_api_doc.parser.validation_parser.class%">
-            <argument type="service" id="validator.mapping.class_metadata_factory"/>
-            <tag name="nelmio_api_doc.extractor.parser" />
-        </service>
         <service id="nelmio_api_doc.formatter.abstract_formatter" class="%nelmio_api_doc.formatter.abstract_formatter.class%" />
         <service id="nelmio_api_doc.formatter.markdown_formatter" class="%nelmio_api_doc.formatter.markdown_formatter.class%"
             parent="nelmio_api_doc.formatter.abstract_formatter" />
diff --git a/Resources/config/services.form.xml b/Resources/config/services.form.xml
new file mode 100644
index 0000000..e83b7de
--- /dev/null
+++ b/Resources/config/services.form.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <parameters>
+        <parameter key="nelmio_api_doc.parser.form_type_parser.class">Nelmio\ApiDocBundle\Parser\FormTypeParser</parameter>
+    </parameters>
+
+    <services>
+        <service id="nelmio_api_doc.parser.form_type_parser" class="%nelmio_api_doc.parser.form_type_parser.class%">
+            <argument type="service" id="form.factory" />
+            <tag name="nelmio_api_doc.extractor.parser" />
+        </service>
+    </services>
+
+</container>
diff --git a/Resources/config/services.validation.xml b/Resources/config/services.validation.xml
new file mode 100644
index 0000000..5ba9b96
--- /dev/null
+++ b/Resources/config/services.validation.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <parameters>
+        <parameter key="nelmio_api_doc.parser.validation_parser.class">Nelmio\ApiDocBundle\Parser\ValidationParser</parameter>
+    </parameters>
+
+    <services>
+        <service id="nelmio_api_doc.parser.validation_parser" class="%nelmio_api_doc.parser.validation_parser.class%">
+            <argument type="service" id="validator.mapping.class_metadata_factory" />
+            <tag name="nelmio_api_doc.extractor.parser" />
+        </service>
+    </services>
+
+</container>
diff --git a/composer.json b/composer.json
index 9fc8413..1c1b84e 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,6 @@
     "require": {
         "symfony/framework-bundle": "~2.1",
         "symfony/twig-bundle": "~2.1",
-        "symfony/form": "~2.1",
         "dflydev/markdown": "1.0.*"
     },
     "conflict": {
@@ -33,6 +32,12 @@
         "jms/serializer-bundle": ">=0.11",
         "sensio/framework-extra-bundle": "~2.1"
     },
+    "suggest": {
+        "symfony/form": "For using form definitions as input.",
+        "symfony/validator": "For making use of validator information in the doc.",
+        "friendsofsymfony/rest-bundle": "For making use of REST information in the doc.",
+        "jms/serializer": "For making use of serializer informamtion in the doc."
+    },
     "minimum-stability": "dev",
     "autoload": {
         "psr-0": { "Nelmio\\ApiDocBundle": "" }