diff --git a/pyproject.toml b/pyproject.toml
index 4c7d67d51..4c5930e18 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ dev-mkdocs = [
 ]
 dev-mypy = [
   "mypy == 1.17.1",
-  "types-Markdown == 3.8.0.20250708",
+  "types-Markdown == 3.8.0.20250809",
   "types-protobuf == 6.30.2.20250822",
   "types-setuptools == 80.9.0.20250801",
   # For checking the noxfile, docs/ script, and tests