diff --git a/example-app/Cargo.toml b/example-app/Cargo.toml
index bbb6bb8..241791b 100644
--- a/example-app/Cargo.toml
+++ b/example-app/Cargo.toml
@@ -28,7 +28,7 @@ hyper-util = { version = "0.1.1", features = ["full"] }
 http-body-util = "0.1.0"
 
 [build-dependencies]
-prost-build = { version = "0.12", optional = true }
+prost-build = { version = "0.13", optional = true }
 prost = "0.12"
 petgraph = "0.6.3" # for prost_build
 prost-types = "0.12" # for prost_build