diff --git a/protos/Cargo.toml b/protos/Cargo.toml
index 56364d188b..ab97e5fb3a 100644
--- a/protos/Cargo.toml
+++ b/protos/Cargo.toml
@@ -8,7 +8,7 @@ description = "Google protobuf message and service definitions used in Lighthous
 [dependencies]
 futures = "0.1"
 grpcio = { version = "0.4", default-features = false, features = ["protobuf-codec"] }
-protobuf = "2.0"
+protobuf = "~2.8.1"
 
 [build-dependencies]
 protoc-grpcio = "0.3.1"