diff --git a/src/Drivers/Translation.php b/src/Drivers/Translation.php
index c30c924..c8b7829 100644
--- a/src/Drivers/Translation.php
+++ b/src/Drivers/Translation.php
@@ -62,7 +62,7 @@ public function getSourceLanguageTranslationsWith($language)
         return $sourceTranslations->map(function ($groups, $type) use ($language, $languageTranslations) {
             return $groups->map(function ($translations, $group) use ($type, $language, $languageTranslations) {
                 $translations = $translations->toArray();
-                array_walk($translations, function (&$value, &$key) use ($type, $group, $language, $languageTranslations) {
+                array_walk($translations, function (&$value, $key) use ($type, $group, $language, $languageTranslations) {
                     $value = [
                         $this->sourceLanguage => $value,
                         $language => $languageTranslations->get($type, collect())->get($group, collect())->get($key),