diff --git a/src/relay/local.rs b/src/relay/local.rs
index b81729d9..0e115a4e 100644
--- a/src/relay/local.rs
+++ b/src/relay/local.rs
@@ -46,6 +46,7 @@ use config::Config;
 ///     password: "server-password".to_string(),
 ///     method: "aes-256-cfb".to_string(),
 ///     timeout: None,
+///     dns_cache_capacity: 1024,
 /// }));
 /// RelayLocal::new(config).run();
 /// ```
diff --git a/src/relay/server.rs b/src/relay/server.rs
index 99716eab..f5ab4d07 100644
--- a/src/relay/server.rs
+++ b/src/relay/server.rs
@@ -42,6 +42,7 @@ use config::Config;
 ///     password: "server-password".to_string(),
 ///     method: "aes-256-cfb".to_string(),
 ///     timeout: None,
+///     dns_cache_capacity: 1024,
 /// }));
 /// RelayServer::new(config).run();
 /// ```