diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..7557817
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,6 @@
+[build-system]
+requires = [
+    "Cython",  # not: cython
+    "numpy>=2.0.0rc1",
+    "scipy"
+]