diff --git a/rslib/Cargo.toml b/rslib/Cargo.toml
index 0b6d23b79..9e0a418cc 100644
--- a/rslib/Cargo.toml
+++ b/rslib/Cargo.toml
@@ -48,6 +48,6 @@ reqwest = { version = "0.10.1", features = ["json", "native-tls-vendored"] }
 reqwest = { version = "0.10.1", features = ["json"] }
 
 [build-dependencies]
-prost-build = "0.5.0"
+prost-build = "0.6.1"
 fluent-syntax = "0.9.2"