diff --git a/cosmic_dustbox/__init__.py b/cosmic_dustbox/__init__.py
index 9d5d5d2513c440f6cc6b29fc05eced48b824b2ee..48e5723e6496c959f2c4b1d490812df8a108bb2f 100644
--- a/cosmic_dustbox/__init__.py
+++ b/cosmic_dustbox/__init__.py
@@ -1,3 +1,5 @@
 """
 Toolbox for cosmic dust species and mixtures and their properties.
 """
+from . import sdist
+from . import crefin