diff --git a/cloudbender/stack.py b/cloudbender/stack.py
index 55ba3de..40e1c8d 100644
--- a/cloudbender/stack.py
+++ b/cloudbender/stack.py
@@ -7,6 +7,7 @@ import time
 import pathlib
 import pprint
 import pulumi
+import importlib
 import pkg_resources
 
 from datetime import datetime, timedelta