diff --git a/pyproject.toml b/pyproject.toml
index e5faabb..cbcbb63 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,7 +61,7 @@ dev-mkdocs = [
 dev-mypy = [
   "mypy == 1.20.0",
   "types-Markdown == 3.10.2.20260211",
-  "types-protobuf == 6.32.1.20260221",
+  "types-protobuf == 7.34.1.20260402",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-common[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]