diff --git a/lib/Form/Util/Styles.php b/lib/Form/Util/Styles.php
index d35a4c005c..9441118725 100644
--- a/lib/Form/Util/Styles.php
+++ b/lib/Form/Util/Styles.php
@@ -26,8 +26,8 @@ class Styles {
   }
 
   public function renderFormSettingsStyles(FormEntity $form, string $selector, string $displayType): string {
-    if (!isset($form['settings']) || !is_array($form['settings'])) return '';
-    $formSettings = $form['settings'];
+    if (!is_array($form->getSettings())) return '';
+    $formSettings = $form->getSettings();
     // Wrapper styles
     $styles = [];
 
diff --git a/lib/Form/Widget.php b/lib/Form/Widget.php
index 2d5b70513c..330a1dcdde 100644
--- a/lib/Form/Widget.php
+++ b/lib/Form/Widget.php
@@ -7,7 +7,6 @@ use MailPoet\Config\Renderer as ConfigRenderer;
 use MailPoet\DI\ContainerWrapper;
 use MailPoet\Entities\FormEntity;
 use MailPoet\Form\Renderer as FormRenderer;
-use MailPoet\Models\Form;
 use MailPoet\Settings\SettingsController;
 use MailPoet\Util\Security;
 use MailPoet\WP\Functions as WPFunctions;
@@ -22,6 +21,9 @@ class Widget extends \WP_Widget {
   /** @var FormRenderer */
   private $formRenderer;
 
+  /** @var FormsRepository */
+  private $formsRepository;
+
   public function __construct() {
     parent::__construct(
       'mailpoet_form',
@@ -32,6 +34,7 @@ class Widget extends \WP_Widget {
     $this->renderer = new \MailPoet\Config\Renderer(!WP_DEBUG, !WP_DEBUG);
     $this->assetsController = new AssetsController($this->wp, $this->renderer, SettingsController::getInstance());
     $this->formRenderer = ContainerWrapper::getInstance()->get(FormRenderer::class);
+    $this->formsRepository = ContainerWrapper::getInstance()->get(FormsRepository::class);
     if (!is_admin()) {
       $this->setupIframe();
     } else {
@@ -44,7 +47,7 @@ class Widget extends \WP_Widget {
 
   public function setupIframe() {
     $formId = (isset($_GET['mailpoet_form_iframe']) ? (int)$_GET['mailpoet_form_iframe'] : 0);
-    if (!$formId || !Form::findOne($formId)) return;
+    if (!$formId || !$this->formsRepository->findOneById($formId)) return;
 
     $formHtml = $this->widget(
       [
@@ -120,7 +123,7 @@ class Widget extends \WP_Widget {
     $selectedForm = isset($instance['form']) ? (int)($instance['form']) : 0;
 
     // get forms list
-    $forms = Form::getPublished()->orderByAsc('name')->findArray();
+    $forms = $this->formsRepository->findBy(['deletedAt' => null], ['name' => 'asc']);
     ?><p>
       <label for="<?php $this->get_field_id( 'title' ) ?>"><?php WPFunctions::get()->_e('Title:', 'mailpoet'); ?></label>
       <input
@@ -135,10 +138,10 @@ class Widget extends \WP_Widget {
       <select class="widefat" id="<?php echo $this->get_field_id('form') ?>" name="<?php echo $this->get_field_name('form'); ?>">
         <?php
         foreach ($forms as $form) {
-          $isSelected = ($selectedForm === (int)$form['id']) ? 'selected="selected"' : '';
-          $formName = $form['name'] ? $this->wp->escHtml($form['name']) : "({$this->wp->_x('no name', 'fallback for forms without a name in a form list')})"
+          $isSelected = ($selectedForm === $form->getId()) ? 'selected="selected"' : '';
+          $formName = $form->getName() ? $this->wp->escHtml($form->getName()) : "({$this->wp->_x('no name', 'fallback for forms without a name in a form list')})"
           ?>
-        <option value="<?php echo (int)$form['id']; ?>" <?php echo $isSelected; ?>><?php echo $formName; ?></option>
+        <option value="<?php echo $form->getId(); ?>" <?php echo $isSelected; ?>><?php echo $formName; ?></option>
         <?php }  ?>
       </select>
     </p>
@@ -194,11 +197,11 @@ class Widget extends \WP_Widget {
     );
 
     // get form
-    $form = Form::getPublished()->findOne($instance['form']);
+    $form = $this->formsRepository->findOneById($instance['form']);
     if (!$form) return '';
-    if ($form->status !== FormEntity::STATUS_ENABLED) return '';
+    if ($form->getDeletedAt()) return '';
+    if ($form->getStatus() !== FormEntity::STATUS_ENABLED) return '';
 
-    $form = $form->asArray();
     $formType = 'widget';
     if (isset($instance['form_type']) && in_array(
         $instance['form_type'],
@@ -212,16 +215,17 @@ class Widget extends \WP_Widget {
       $formType = $instance['form_type'];
     }
 
-    $body = (isset($form['body']) ? $form['body'] : []);
+    $body = (!empty($form->getBody()) ? $form->getBody() : []);
     $output = '';
+    $settings = $form->getSettings();
 
-    if (!empty($body) && isset($form['settings']) && is_array($form['settings'])) {
-      $formId = $this->id_base . '_' . $form['id']; // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
+    if (!empty($body) && is_array($settings)) {
+      $formId = $this->id_base . '_' . $form->getId(); // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
       $data = [
         'form_html_id' => $formId,
-        'form_id' => $form['id'],
+        'form_id' => $form->getId(),
         'form_type' => $formType,
-        'form_success_message' => $form['settings']['success_message'],
+        'form_success_message' => $settings['success_message'],
         'title' => $title,
         'styles' => $this->formRenderer->renderStyles($form, '#' . $formId, FormEntity::DISPLAY_TYPE_OTHERS),
         'html' => $this->formRenderer->renderHTML($form),
@@ -235,12 +239,12 @@ class Widget extends \WP_Widget {
       $data['success'] = (
         (isset($_GET['mailpoet_success']))
         &&
-        ((int)$_GET['mailpoet_success'] === (int)$form['id'])
+        ((int)$_GET['mailpoet_success'] === $form->getId())
       );
       $data['error'] = (
         (isset($_GET['mailpoet_error']))
         &&
-        ((int)$_GET['mailpoet_error'] === (int)$form['id'])
+        ((int)$_GET['mailpoet_error'] === $form->getId())
       );
 
       // generate security token
diff --git a/tests/integration/Subscription/FormTest.php b/tests/integration/Subscription/FormTest.php
index 22295f484f..7052827349 100644
--- a/tests/integration/Subscription/FormTest.php
+++ b/tests/integration/Subscription/FormTest.php
@@ -7,8 +7,8 @@ use MailPoet\API\JSON\API;
 use MailPoet\API\JSON\ErrorResponse;
 use MailPoet\API\JSON\Response;
 use MailPoet\DI\ContainerWrapper;
+use MailPoet\Entities\FormEntity;
 use MailPoet\Form\Util\FieldNameObfuscator;
-use MailPoet\Models\Form as FormModel;
 use MailPoet\Models\Segment as SegmentModel;
 use MailPoet\Models\Subscriber as SubscriberModel;
 use MailPoet\Settings\SettingsController;
@@ -42,26 +42,24 @@ class FormTest extends \MailPoetTest {
         'name' => 'Test segment',
       ]
     );
-    $this->form = FormModel::createOrUpdate(
+    $this->form = new FormEntity('Test form');
+    $this->form->setBody([
       [
-        'name' => 'Test form',
-        'body' => [
-          [
-            'type' => 'text',
-            'id' => 'email',
-          ],
-        ],
-        'settings' => [
-          'segments' => [$this->segment->id],
-        ],
-      ]
-    );
+        'type' => 'text',
+        'id' => 'email',
+      ],
+    ]);
+    $this->form->setSettings([
+      'segments' => [$this->segment->id],
+    ]);
+    $this->entityManager->persist($this->form);
+    $this->entityManager->flush();
     $obfuscator = new FieldNameObfuscator(WPFunctions::get());
     $obfuscatedEmail = $obfuscator->obfuscate('email');
     $this->requestData = [
       'action' => 'mailpoet_subscription_form',
       'data' => [
-        'form_id' => $this->form->id,
+        'form_id' => $this->form->getId(),
         $obfuscatedEmail => $this->testEmail,
       ],
       'token' => Security::generateToken(),
@@ -88,18 +86,18 @@ class FormTest extends \MailPoetTest {
     $formController = new Form(ContainerWrapper::getInstance()->get(API::class), $urlHelper);
     $result = $formController->onSubmit($this->requestData);
     expect(SubscriberModel::findOne($this->testEmail))->notEmpty();
-    expect($result['mailpoet_success'])->equals($this->form->id);
+    expect($result['mailpoet_success'])->equals($this->form->getId());
     expect($result['mailpoet_error'])->null();
   }
 
   public function testItSubscribesAndRedirectsToCustomUrlWithSuccessResponse() {
     // update form with a redirect setting
     $form = $this->form;
-    $formSettings = unserialize($form->settings);
+    $formSettings = $form->getSettings();
     $formSettings['on_success'] = 'page';
     $formSettings['success_page'] = $this->post;
-    $form->settings = serialize($formSettings);
-    $form->save();
+    $form->setSettings($formSettings);
+    $this->entityManager->flush();
     $urlHelper = Stub::make(UrlHelper::class, [
       'redirectTo' => function($params) {
         return $params;
@@ -126,7 +124,7 @@ class FormTest extends \MailPoetTest {
     $formController = new Form(ContainerWrapper::getInstance()->get(API::class), $urlHelper);
     $result = $formController->onSubmit($requestData);
     expect(SubscriberModel::findMany())->isEmpty();
-    expect($result['mailpoet_error'])->equals($this->form->id);
+    expect($result['mailpoet_error'])->equals($this->form->getId());
     expect($result['mailpoet_success'])->null();
   }
 
@@ -150,7 +148,7 @@ class FormTest extends \MailPoetTest {
   public function _after() {
     wp_delete_post($this->post);
     ORM::raw_execute('TRUNCATE ' . SegmentModel::$_table);
-    ORM::raw_execute('TRUNCATE ' . FormModel::$_table);
+    $this->truncateEntity(FormEntity::class);
     ORM::raw_execute('TRUNCATE ' . SubscriberModel::$_table);
     $this->diContainer->get(SettingsRepository::class)->truncate();
   }