diff --git a/project_name.py b/project_name/__init__.py
similarity index 100%
rename from project_name.py
rename to project_name/__init__.py
diff --git a/pyproject.toml b/pyproject.toml
index fc0e75f..0b00568 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,8 @@
 requires = ["setuptools", "setuptools-scm"]
 build-backend = "setuptools.build_meta"
 
+[tool.setuptools]
+packages = ["project_name"]
 
 [project]
 name = "project_name"