diff --git a/pyproject.toml b/pyproject.toml
index 0d2ad477..2e5e6a4c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ dev-mkdocs = [
 dev-mypy = [
   "mypy == 1.17.1",
   "grpc-stubs == 1.53.0.6",
-  "types-Markdown == 3.8.0.20250708",
+  "types-Markdown == 3.8.0.20250809",
   "types-protobuf == 6.30.2.20250703",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-microgrid[dev-mkdocs,dev-noxfile,dev-pytest]",