diff --git a/setup.cfg b/setup.cfg
index f1a3e54..47ffee6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,8 +36,12 @@ keywords =
 setup_requires =
 	setuptools>=39.2.0
 python_requires = >=3.6
-packages =
+packages = find:
+
+[options.packages.find]
+include =
 	rsrcfork
+	rsrcfork.*
 
 [options.entry_points]
 console_scripts =