diff --git a/pyproject.toml b/pyproject.toml
index bd8d947..069b00e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,3 +25,6 @@ mypy = "^0.981"
 [build-system]
 requires = ["maturin>=1.5,<1.6"]
 build-backend = "maturin"
+
+[tool.maturin]
+bindings = "cffi"