diff --git a/pyproject.toml b/pyproject.toml
index abc1e1c6..81312f35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,7 +75,7 @@ dev-mypy = [
   "mypy == 1.15.0",
   "grpc-stubs == 1.53.0.6",
   "types-Markdown == 3.8.0.20250415",
-  "types-protobuf == 5.29.1.20250403",
+  "types-protobuf == 6.30.2.20250516",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-microgrid[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]