diff --git a/src/Conversations/ConversationsEndpoint.php b/src/Conversations/ConversationsEndpoint.php
index 6d1e30f9..6150b8ee 100644
--- a/src/Conversations/ConversationsEndpoint.php
+++ b/src/Conversations/ConversationsEndpoint.php
@@ -48,8 +48,8 @@ public function create(Conversation $conversation): ?int
     /**
      * Updates the custom field values for a given conversation.  Ommitted fields are removed.
      *
-     * @param int                                             $conversationId
-     * @param CustomField[]|Collection|CustomFieldsCollection $customFields
+     * @param int                                                   $conversationId
+     * @param CustomField[]|array|Collection|CustomFieldsCollection $customFields
      */
     public function updateCustomFields(int $conversationId, $customFields): void
     {