diff --git a/README.md b/README.md
index d3186bf..be2e99b 100644
--- a/README.md
+++ b/README.md
@@ -216,4 +216,4 @@ $this-addFlash(Everlution\AjaxcomBundle\Flash::SUCCESS, 'Your request has been s
 - add example for rendering modal
 - add twig templates for rendering modal
 - add complex usage example
-
+- add FormType documentation
diff --git a/src/Ajaxcom.php b/src/Ajaxcom.php
index 69d4d1f..2afbc90 100644
--- a/src/Ajaxcom.php
+++ b/src/Ajaxcom.php
@@ -39,8 +39,6 @@ class Ajaxcom
     private $addBlocks = [];
     /** @var string[] */
     private $removeBlocks = [];
-    /** @var Callback[] */
-    private $callbacks = [];
     /** @var bool */
     private $modal = false;
 
@@ -116,7 +114,9 @@ public function renderAjaxBlock(string $id, array $callbacks = []): self
 
     public function addCallback(Callback $callback)
     {
-        $this->callbacks[] = $callback;
+        $callbacks = $this->session->get(self::AJAXCOM_CALLBACKS, []);
+        $callbacks[] = $callback;
+        $this->session->set(self::AJAXCOM_CALLBACKS, $callbacks);
 
         return $this;
     }
@@ -228,9 +228,12 @@ private function addBlocks(Handler $ajax, string $view, array $parameters): Hand
      */
     private function addCallbacks(Handler $ajax): Handler
     {
-        foreach ($this->callbacks as $callback) {
+        $callbacks = $this->session->get(self::AJAXCOM_CALLBACKS, []);
+        /** @var Callback $callback */
+        foreach ($callbacks as $callback) {
             $ajax->callback($callback->getFunction(), $callback->getParameters());
         }
+        $this->session->remove(self::AJAXCOM_CALLBACKS);
 
         return $ajax;
     }
diff --git a/src/Form/Type/AjaxcomForm.php b/src/Form/Type/AjaxcomForm.php
new file mode 100644
index 0000000..bdf4af8
--- /dev/null
+++ b/src/Form/Type/AjaxcomForm.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Everlution\AjaxcomBundle\Form\Type;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * Class AjaxcomForm.
+ * @author Ivan Barlog <ivan.barlog@everlution.sk>
+ */
+class AjaxcomForm extends AbstractType
+{
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults(
+            [
+                'attr' =>
+                    [
+                        'novalidate' => 'novalidate',
+                        'data-ajaxcom' => '',
+                    ],
+            ]
+        );
+    }
+}