diff --git a/dione-server/Cargo.toml b/dione-server/Cargo.toml
index 94dda90..7fd9cf9 100644
--- a/dione-server/Cargo.toml
+++ b/dione-server/Cargo.toml
@@ -12,7 +12,7 @@ keywords = ["libp2p", "messaging"]
 
 [dependencies]
 tonic = {version = "0.5", features = ["tls"]}
-prost = "0.8"
+prost = "0.9"
 tokio = { version = "1.13", features = ["macros", "rt-multi-thread", "fs"] }
 tracing = "0.1"
 tracing-subscriber = "0.3.1"