diff --git a/pyproject.toml b/pyproject.toml
index 34680b2..95f573c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,10 +37,9 @@ test = [
     "testtools>=2.2.0",  # MIT
 ]
 
-[tool.setuptools]
-packages = [
-    "osc_lib"
-]
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["osc_lib*"]
 
 [tool.mypy]
 show_column_numbers = true