diff --git a/pyproject.toml b/pyproject.toml
index 40e23027..ff7d2617 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -66,7 +66,7 @@ dev-mypy = [
   # For checking the noxfile, docs/ script, and tests
   "frequenz-channels[dev-mkdocs,dev-noxfile,dev-pytest]",
   "mypy == 1.20.2",
-  "types-Markdown == 3.10.2.20260408",
+  "types-Markdown == 3.10.2.20260518",
 ]
 dev-noxfile = ["nox == 2026.4.10", "frequenz-repo-config[lib] == 0.17.0"]
 dev-pylint = [