diff --git a/src/Entity/Book.php b/src/Entity/Book.php
index d01bfe9..2562b53 100644
--- a/src/Entity/Book.php
+++ b/src/Entity/Book.php
@@ -189,7 +189,7 @@ public static function getEntitiesFromArray(array $array) : array
         foreach ($array as $object) {
             if (in_array(
                 $object['_type'],
-                [self::TYPE_PDF, self::TYPE_AUDIO, self::TYPE_VIDEO, self::TYPE_AUDIOTALK],
+                [self::TYPE_PDF, self::TYPE_AUDIO, self::TYPE_VIDEO, self::TYPE_AUDIOTALK, self::TYPE_CLASSROOM],
                 true)
             ) {
                 $entities[] = self::objectTransformer($object);