diff --git a/crates/rooch-faucet/src/discord.rs b/crates/rooch-faucet/src/discord.rs
index 53eba8ffc2..1d65b6106b 100644
--- a/crates/rooch-faucet/src/discord.rs
+++ b/crates/rooch-faucet/src/discord.rs
@@ -23,7 +23,7 @@ pub struct DiscordConfig {
 impl App {
     async fn handle_faucet_request(&self, options: &[CommandDataOption]) -> String {
         let value = options
-            .get(0)
+            .first()
             .expect("Expected address option")
             .value
             .clone();
diff --git a/crates/rooch-faucet/src/metrics.rs b/crates/rooch-faucet/src/metrics.rs
index 92b6196b9c..94ae1752f7 100644
--- a/crates/rooch-faucet/src/metrics.rs
+++ b/crates/rooch-faucet/src/metrics.rs
@@ -3,7 +3,7 @@
 
 use prometheus::{
     register_histogram_with_registry, register_int_counter_with_registry, Histogram, IntCounter,
-    IntGauge, Registry,
+    Registry,
 };
 
 /// Prometheus metrics which can be displayed in Grafana, queried and alerted on