diff --git a/pyproject.toml b/pyproject.toml
index 90193f03..9400fa4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ Package = "https://pypi.org/project/custodian"
 
 [tool.setuptools.packages.find]
 where = ["src"]
-include = ["custodian"]
+include = ["custodian*"]
 
 [tool.ruff]
 target-version = "py311"