diff --git a/pyproject.toml b/pyproject.toml
index 2927578a..9502ab73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -144,5 +144,5 @@ known-first-party = ["mex", "tests"]
 convention = "google"
 
 [build-system]
-requires = ["pdm-backend==2.1.8"]
+requires = ["pdm-backend==2.3.0"]
 build-backend = "pdm.backend"