diff --git a/Cargo.toml b/Cargo.toml
index 18abe7b..1f92b83 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,14 +11,10 @@ default = ["mastlogin"]
 mastlogin = ["reqwest"]
 
 [dependencies]
-rocket = { version = "=0.5.0-rc.1", features = ["json"] }
-rocket_codegen = "=0.5.0-rc.1"
-rocket_http = "=0.5.0-rc.1"
-rocket_sync_db_pools_codegen = "=0.1.0-rc.1"
-rocket_sync_db_pools = { version = "=0.1.0-rc.1", features = ["diesel_postgres_pool"] }
+rocket = { version = "=0.5.0-rc.2", features = ["json"] }
+rocket_sync_db_pools = { version = "=0.1.0-rc.2", features = ["diesel_postgres_pool"] }
 diesel = { version = "1.4.8", features = ["postgres", "chrono"] }
 diesel_migrations = "1.4.0"
-tokio = "1.17.0"
 redis = { version="0.21.5", features = ["aio", "tokio-comp"] }
 chrono = { version="0.4.19", features = ["serde"] }
 rand = "0.8.5"
@@ -28,5 +24,6 @@ log = "0.4.16"
 env_logger = "0.9.0"
 web-push = "0.9.2"
 url = "2.2.2"
+futures = "0.3.24"
 
 reqwest = { version = "0.11.10", features = ["json"], optional = true }
diff --git a/rust-toolchain b/rust-toolchain
index 2bf5ad0..8725364 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-stable
+1.64
diff --git a/src/api/attention.rs b/src/api/attention.rs
index 4b04fc0..590da25 100644
--- a/src/api/attention.rs
+++ b/src/api/attention.rs
@@ -108,7 +108,7 @@ pub async fn set_notification(pid: i32, ni: Form<NotificatinInput>, _user: Curre
         .ok_or(UnknownPushEndpoint)?
         .to_string();
     (url_host.ends_with("googleapis.com") || url_host.ends_with("mozilla.com"))
-        .then(|| ())
+        .then_some(())
         .ok_or(UnknownPushEndpoint)?;
 
     if ni.enable {
diff --git a/src/api/comment.rs b/src/api/comment.rs
index 4aeb5ee..b6b3793 100644
--- a/src/api/comment.rs
+++ b/src/api/comment.rs
@@ -7,9 +7,8 @@ use crate::rds_conn::RdsConn;
 use crate::rds_models::*;
 use crate::schema;
 use diesel::{ExpressionMethods, QueryDsl, RunQueryDsl};
+use futures::{future, join};
 use rocket::form::Form;
-use rocket::futures::future;
-use rocket::futures::join;
 use rocket::serde::{json::json, Serialize};
 use std::collections::HashMap;
 
diff --git a/src/api/mod.rs b/src/api/mod.rs
index 0a290f8..80ad830 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::unnecessary_lazy_evaluations)]
+
 use crate::db_conn::Db;
 use crate::libs::diesel_logger::LoggingConnection;
 use crate::models::*;
diff --git a/src/api/operation.rs b/src/api/operation.rs
index 1160080..5cc448a 100644
--- a/src/api/operation.rs
+++ b/src/api/operation.rs
@@ -108,10 +108,10 @@ pub async fn report(ri: Form<ReportInput>, user: CurrentUser, db: Db, rconn: Rds
         .await?
         .unwrap_or(0)
         < 10)
-        .then(|| ())
+        .then_some(())
         .ok_or(NotAllowed)?;
 
-    (!ri.reason.is_empty()).then(|| ()).ok_or(NoReason)?;
+    (!ri.reason.is_empty()).then_some(()).ok_or(NoReason)?;
 
     let mut p = Post::get(&db, &rconn, ri.pid).await?;
     if ri.should_hide.is_some() {
diff --git a/src/api/post.rs b/src/api/post.rs
index 41f5db9..f600499 100644
--- a/src/api/post.rs
+++ b/src/api/post.rs
@@ -87,23 +87,23 @@ async fn p2output(p: &Post, user: &CurrentUser, db: &Db, rconn: &RdsConn) -> Api
     Ok(PostOutput {
         pid: p.id,
         room_id: p.room_id,
-        text: can_view.then(|| p.content.clone()).unwrap_or_default(),
-        cw: (!p.cw.is_empty()).then(|| p.cw.clone()),
+        text: can_view.then_some(p.content.clone()).unwrap_or_default(),
+        cw: (!p.cw.is_empty()).then_some(p.cw.clone()),
         n_attentions: p.n_attentions,
         n_comments: p.n_comments,
         create_time: p.create_time.timestamp(),
         last_comment_time: p.last_comment_time.timestamp(),
         allow_search: p.allow_search,
-        author_title: (!p.author_title.is_empty()).then(|| p.author_title.clone()),
+        author_title: (!p.author_title.is_empty()).then_some(p.author_title.clone()),
         is_tmp: p.is_tmp,
-        is_reported: user.is_admin.then(|| p.is_reported),
+        is_reported: user.is_admin.then_some(p.is_reported),
         comments: OptionFuture::from(
             comments.map(|cs| async move { c2output(p, &cs, user, &cached_block_dict).await }),
         )
         .await,
         can_del: p.check_permission(user, "wd").is_ok(),
         attention: Attention::init(&user.namehash, rconn).has(p.id).await?,
-        hot_score: user.is_admin.then(|| p.hot_score),
+        hot_score: user.is_admin.then_some(p.hot_score),
         is_blocked,
         /*
         blocked_count: if user.is_admin {
diff --git a/src/api/vote.rs b/src/api/vote.rs
index c74f363..ea76a86 100644
--- a/src/api/vote.rs
+++ b/src/api/vote.rs
@@ -18,7 +18,7 @@ pub async fn get_poll_dict(pid: i32, rconn: &RdsConn, namehash: &str) -> Option<
                 .has(namehash)
                 .await
                 .unwrap_or_default()
-                .then(|| opt)
+                .then_some(opt)
         }))
         .await
         .into_iter()
diff --git a/src/cache.rs b/src/cache.rs
index 356e8f9..38099ef 100644
--- a/src/cache.rs
+++ b/src/cache.rs
@@ -355,7 +355,7 @@ impl BlockDictCache {
 
         let missing: Vec<(String, bool)> =
             future::try_join_all(hash_list.iter().filter_map(|hash| {
-                (!block_dict.contains_key(&hash.to_string())).then(|| async {
+                (!block_dict.contains_key(&hash.to_string())).then_some(async {
                     Ok::<(String, bool), RedisError>((
                         hash.to_string(),
                         BlockedUsers::check_if_block(&self.rconn, user, hash).await?,
diff --git a/src/cors.rs b/src/cors.rs
index 96a35e4..5ebe21a 100644
--- a/src/cors.rs
+++ b/src/cors.rs
@@ -19,11 +19,11 @@ impl Fairing for Cors {
     }
 
     async fn on_response<'r>(&self, request: &'r Request<'_>, response: &mut Response<'r>) {
-        if let Some(origin) = request
-            .headers()
-            .get_one("Origin")
-            .and_then(|origin| self.whitelist.contains(&origin.to_string()).then(|| origin))
-        {
+        if let Some(origin) = request.headers().get_one("Origin").and_then(|origin| {
+            self.whitelist
+                .contains(&origin.to_string())
+                .then_some(origin)
+        }) {
             response.set_header(Header::new("Access-Control-Allow-Origin", origin));
             response.set_header(Header::new(
                 "Access-Control-Allow-Methods",
diff --git a/src/login.rs b/src/login.rs
index b0bdd10..22d6ec1 100644
--- a/src/login.rs
+++ b/src/login.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::unused_unit)]
+
 use crate::db_conn::Db;
 use crate::models::User;
 use rocket::request::{FromRequest, Outcome, Request};
diff --git a/src/main.rs b/src/main.rs
index 26b4590..61bb536 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,17 +28,18 @@ use diesel::Connection;
 use random_hasher::RandomHasher;
 use rds_conn::{init_rds_client, RdsConn};
 use rds_models::clear_outdate_redis_data;
+use rocket::tokio;
+use rocket::tokio::time::{sleep, Duration};
 use std::env;
-use tokio::time::{sleep, Duration};
 
 embed_migrations!("migrations/postgres");
 
 #[rocket::main]
-async fn main() -> Result<(), rocket::Error> {
+async fn main() {
     load_env();
     if env::args().any(|arg| arg.eq("--init-database")) {
         init_database();
-        return Ok(());
+        return;
     }
     env_logger::init();
     let rmc = init_rds_client().await;
@@ -61,7 +62,7 @@ async fn main() -> Result<(), rocket::Error> {
         }
     });
 
-    rocket::build()
+    let _ = rocket::build()
         .mount(
             "/_api/v1",
             routes![
@@ -119,7 +120,7 @@ async fn main() -> Result<(), rocket::Error> {
                 .collect::<Vec<String>>(),
         })
         .launch()
-        .await
+        .await;
 }
 
 fn load_env() {