diff --git a/classy_paragraphs.module b/classy_paragraphs.module
index 960a523..aae4cba 100644
--- a/classy_paragraphs.module
+++ b/classy_paragraphs.module
@@ -7,6 +7,7 @@
 
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\field\FieldConfigInterface;
+use Drupal\Core\Template\Attribute;
 
 /**
  * Implements hook_preprocess_HOOK().
@@ -15,6 +16,7 @@ function classy_paragraphs_preprocess_paragraph(&$variables) {
   //@TODO Implement as service.
   /** @var \Drupal\paragraphs\Entity\Paragraph $paragraph */
   $paragraph = $variables['paragraph'];
+  $variables['attributes'] = new Attribute();
 
   // Find fields which are referencing classy_paragraphs.
   $class_fields = [];
@@ -33,13 +35,17 @@ function classy_paragraphs_preprocess_paragraph(&$variables) {
 
   foreach($class_fields as $class_field) {
     $field_name = $class_field->get('field_name');
-
     if (!$paragraph->get($field_name)->isEmpty()) {
-      //@TODO handle multiple value fields.
-      $text_classes = $paragraph->get($field_name)->entity->getClasses();
-      $classes = explode("\r\n", $text_classes);
-      if (!empty($classes)) {
-        $variables['attributes']['class'] = $classes;
+
+      $field = $paragraph->get($field_name);
+      $classes = $field->referencedEntities();
+
+      foreach($classes as $class) {
+        $raw_classes = $class->getClasses();
+        $array_classes = explode("\r\n", $raw_classes);
+        if (!empty($array_classes)) {
+          $variables['attributes']->addClass($array_classes);
+        }
       }
     }
   }