diff --git a/pyproject.toml b/pyproject.toml
index cf6b82ce..2340ec73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -90,7 +90,7 @@ dev-mypy = [
   "mypy == 1.18.2",
   "types-setuptools >= 67.6.0, < 81", # Should match the api dependency
   "types-Markdown == 3.9.0.20250906",
-  "types-PyYAML == 6.0.12.20250822",
+  "types-PyYAML == 6.0.12.20250915",
   "types-babel == 2.11.0.15",
   "types-colorama == 0.4.15.20250801",
   # For checking the noxfile, docs/ script, and tests