diff --git a/src/CloudApi/Client.php b/src/CloudApi/Client.php
index <HASH>..<HASH> 100644
--- a/src/CloudApi/Client.php
+++ b/src/CloudApi/Client.php
@@ -313,7 +313,7 @@ class Client extends GuzzleClient
 
     /**
      * @param string $id
-     * @param string $domains
+     * @param array $domains
      * @return StreamInterface
      */
     public function purgeVarnishCache($id, $domains)
Changes type hinting on domains.