diff --git a/pyproject.toml b/pyproject.toml
index 53ff55be..c6a29eb7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,5 +72,5 @@ custom-hook = "pdm_build.py"
 moonraker = "moonraker.server:main"
 
 [build-system]
-requires = ["pdm-backend==2.3.3"]
+requires = ["pdm-backend<=2.4.3"]
 build-backend = "pdm.backend"