diff --git a/pyproject.toml b/pyproject.toml
index 54e721b..95683a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,5 +31,5 @@ dev = []
 [tool.black]
 
 [build-system]
-requires = ["pdm-pep517"]
-build-backend = "pdm.pep517.api"
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"