diff --git a/example/Cargo.toml b/example/Cargo.toml
index 47094e6b..ca9fceab 100644
--- a/example/Cargo.toml
+++ b/example/Cargo.toml
@@ -51,3 +51,7 @@ path = "./async-stream-client.rs"
 
 [build-dependencies]
 ttrpc-codegen = { path = "../ttrpc-codegen"}
+
+[patch.crates-io]
+ttrpc-compiler = { path = "/home/tim/project/ttrpc-rust/compiler"}
+
diff --git a/example/protocols/mod.rs b/example/protocols/mod.rs
index d3d3a275..9ed5a35a 100644
--- a/example/protocols/mod.rs
+++ b/example/protocols/mod.rs
@@ -5,5 +5,4 @@
 #[cfg(unix)]
 pub mod asynchronous;
 #[cfg(unix)]
-pub use asynchronous as r#async;
 pub mod sync;
diff --git a/example/server.rs b/example/server.rs
index c15bf337..54d33f21 100644
--- a/example/server.rs
+++ b/example/server.rs
@@ -81,14 +81,8 @@ impl agent_ttrpc::AgentService for AgentService {
 
 fn main() {
     simple_logging::log_to_stderr(LevelFilter::Trace);
-
-    let h = Box::new(HealthService {}) as Box<dyn health_ttrpc::Health + Send + Sync>;
-    let h = Arc::new(h);
-    let hservice = health_ttrpc::create_health(h);
-
-    let a = Box::new(AgentService {}) as Box<dyn agent_ttrpc::AgentService + Send + Sync>;
-    let a = Arc::new(a);
-    let aservice = agent_ttrpc::create_agent_service(a);
+    let hservice = health_ttrpc::create_health(Arc::new(HealthService {}));
+    let aservice = agent_ttrpc::create_agent_service(Arc::new(AgentService {}));
 
     utils::remove_if_sock_exist(utils::SOCK_ADDR).unwrap();
     let mut server = Server::new()