diff --git a/pyproject.toml b/pyproject.toml
index 2187b86d..792bc434 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ dev-mypy = [
   # For checking the noxfile, docs/ script, and tests
   "frequenz-channels[dev-mkdocs,dev-noxfile,dev-pytest]",
   "mypy == 1.17.1",
-  "types-Markdown == 3.8.0.20250415",
+  "types-Markdown == 3.8.0.20250809",
 ]
 dev-noxfile = ["nox == 2025.5.1", "frequenz-repo-config[lib] == 0.13.5"]
 dev-pylint = [