diff --git a/graphene/relay/connection.py b/graphene/relay/connection.py
index 05f4a68a..b8f49207 100644
--- a/graphene/relay/connection.py
+++ b/graphene/relay/connection.py
@@ -5,6 +5,7 @@ from functools import partial
 import six
 
 from graphql_relay import connection_from_list
+from promise import Promise
 
 from ..types import (AbstractType, Boolean, Enum, Int, Interface, List, NonNull, Scalar, String,
                      Union)