diff --git a/pyproject.toml b/pyproject.toml
index 27a1899..eac0046 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ build-backend = "setuptools.build_meta"
 include-package-data = true
 
 [tool.setuptools.packages.find]
+include = ["rdatasets", "rdatasets.*"]
 where = ["rdatasets"]
 
 [tool.setuptools.package-data]