diff --git a/pyproject.toml b/pyproject.toml
index 5f94b6e..59c06e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = ["setuptools"]
-build-backends = "setuptools.build_meta"
+build-backend = "setuptools.build_meta"
 
 [project]
 name = "enclave_shelly"