diff --git a/cfig/sample/__main__.py b/cfig/sample/__main__.py
index aede5b7..0ac76b9 100644
--- a/cfig/sample/__main__.py
+++ b/cfig/sample/__main__.py
@@ -1,3 +1,8 @@
+"""
+Sample configuration module using :mod:`cfig`.
+"""
+
+
 import cfig
 import typing