diff --git a/src/Entity/Book.php b/src/Entity/Book.php
index 3b131755..8b5c356c 100644
--- a/src/Entity/Book.php
+++ b/src/Entity/Book.php
@@ -284,7 +284,7 @@ public function setPublishDate(?\DateTimeInterface $publishDate): static
     public function getAuthors(): array
     {
         return array_map(static function ($item) {
-            return ucwords(strtolower($item, self::UCWORDS_SEPARATORS));
+            return ucwords(strtolower($item), self::UCWORDS_SEPARATORS);
         }, $this->authors);
     }