diff --git a/Cargo.toml b/Cargo.toml
index 870fd79e0..c834622bd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -102,7 +102,7 @@ http = "<=0.2"
 triggered = "0"
 futures = "*"
 futures-util = "*"
-prost = "*"
+prost = "0.12"
 once_cell = "1"
 lazy_static = "1"
 config = { version = "0", default-features = false, features = ["toml"] }