diff --git a/pyproject.toml b/pyproject.toml
index c768d61d..0a824f29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = ">=3.9,<3.12"
 c65faucet = "1.0.69"
 grpcio = "1.62.1"
 grpcio-tools = "1.62.1"
-protobuf = "4.25.3"
+protobuf = "5.26.1"
 prometheus_client = "0.20.0"
 pybind11 = "2.12.0"
 os-ken = "<=2.8.1"