diff --git a/Cargo.toml b/Cargo.toml
index a62b6296..21409c96 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ fnv = "^1.0"
 lazy_static = "^1.4"
 libc = { version = "^0.2", optional = true }
 parking_lot = "^0.12"
-protobuf = { version = "^2.0", optional = true }
+protobuf = { version = "^3.5", optional = true }
 memchr = "^2.3"
 reqwest = { version = "^0.12", features = ["blocking"], optional = true }
 thiserror = "^1.0"