diff --git a/python/pyproject.toml b/python/pyproject.toml
deleted file mode 100644
index b69648a..0000000
--- a/python/pyproject.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-[build-system]
-requires = ["Cython>=0.22", "numpy>=1.10.0", "pystan>=2.14"]