diff --git a/pyproject.toml b/pyproject.toml
index cb1d4b264..713e8e6d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -289,7 +289,7 @@ dev = [
     "freezegun==1.2.2",
     "furo==2023.3.27",
     "mypy==1.2.0",
-    "pdm==2.4.9",
+    "pdm==2.5.1",
     "pip_check_reqs==2.4.4",
     "pydocstyle==6.3.0",
     "pyenchant==3.2.2",