diff --git a/pyproject.toml b/pyproject.toml
index b8e7ecc..c2798ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [dependency-groups]
 dev = [
-  "ruamel.yaml==0.18.8",
+  "ruamel.yaml==0.18.9",
   {include-group = "pre-commit"}
 ]
 pre-commit = [