diff --git a/rattail_mailchimp/config.py b/rattail_mailchimp/config.py
index 9005b78..4bad837 100644
--- a/rattail_mailchimp/config.py
+++ b/rattail_mailchimp/config.py
@@ -24,10 +24,10 @@
 Config extensions for rattail-mailchimp
 """
 
-from rattail.config import ConfigExtension
+from wuttjamaican.conf import WuttaConfigExtension
 
 
-class MailchimpConfigExtension(ConfigExtension):
+class MailchimpConfigExtension(WuttaConfigExtension):
     """
     Config extension for rattail-mailchimp
     """