diff --git a/cof/settings/local.py b/cof/settings/local.py
index 0ccb05dd..bb06f006 100644
--- a/cof/settings/local.py
+++ b/cof/settings/local.py
@@ -19,7 +19,7 @@ for app in bds_prod.INSTALLED_APPS:
 # Tweaks for debug/local development
 # ---
 
-ALLOWED_HOSTS = None
+ALLOWED_HOSTS = []
 
 DEBUG = True
 EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"