diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9b933e7
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,8 @@
+# pyproject.toml
+
+[build-system]
+requires = ["setuptools>=61.0.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[options.packages.find_namespace]
+where = "costs"
\ No newline at end of file
diff --git a/pyptoject.toml b/pyptoject.toml
deleted file mode 100644
index e69de29..0000000