diff --git a/stix2/__init__.py b/stix2/__init__.py
index beb54b0..9047862 100644
--- a/stix2/__init__.py
+++ b/stix2/__init__.py
@@ -28,6 +28,7 @@
 
 # flake8: noqa
 
+from .confidence import scales
 from .core import _collect_stix2_mappings, parse, parse_observable
 from .datastore import CompositeDataSource
 from .datastore.filesystem import (