diff --git a/Cargo.toml b/Cargo.toml
index f250d3145..98da263dd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ failpoint = ["fail"]
 
 [dependencies]
 log = ">0.2"
-protobuf = "2.2.4"
+protobuf = "~2.0-2.2"
 quick-error = "1.2.2"
 rand = "0.5.4"
 hashbrown = "0.1"