diff --git a/youmubot-osu/src/discord/mod.rs b/youmubot-osu/src/discord/mod.rs
index 8c7aeaf..b50d559 100644
--- a/youmubot-osu/src/discord/mod.rs
+++ b/youmubot-osu/src/discord/mod.rs
@@ -53,7 +53,7 @@ impl TypeMapKey for OsuClient {
 ///  - Commands on the "osu" prefix
 ///  - Hooks. Hooks are completely opt-in.
 ///  
-pub fn setup(
+pub async fn setup(
     _path: &std::path::Path,
     data: &mut TypeMap,
     announcers: &mut AnnouncerHandler,
@@ -71,13 +71,23 @@ pub fn setup(
 
     // API client
     let http_client = data.get::<HTTPClient>().unwrap().clone();
-    let mk_osu_client = || {
-        Arc::new(OsuHttpClient::new(
-            std::env::var("OSU_API_KEY").expect("Please set OSU_API_KEY as osu! api key."),
-            http_client.clone(),
-        ))
+    let mk_osu_client = || async {
+        Arc::new(
+            OsuHttpClient::new(
+                std::env::var("OSU_API_KEY").expect("Please set OSU_API_KEY as osu! api key."),
+                http_client.clone(),
+                std::env::var("OSU_API_CLIENT_ID")
+                    .expect("Please set OSU_API_CLIENT_ID as osu! api v2 client ID.")
+                    .parse()
+                    .expect("client_id should be u64"),
+                std::env::var("OSU_API_CLIENT_SECRET")
+                    .expect("Please set OSU_API_CLIENT_SECRET as osu! api v2 client secret."),
+            )
+            .await
+            .expect("osu! should be initialized"),
+        )
     };
-    let osu_client = mk_osu_client();
+    let osu_client = mk_osu_client().await;
     data.insert::<OsuClient>(osu_client.clone());
     data.insert::<oppai_cache::BeatmapCache>(oppai_cache::BeatmapCache::new(
         http_client.clone(),
@@ -89,7 +99,7 @@ pub fn setup(
     ));
 
     // Announcer
-    let osu_client = mk_osu_client();
+    let osu_client = mk_osu_client().await;
     announcers.add(
         announcer::ANNOUNCER_KEY,
         announcer::Announcer::new(osu_client),
diff --git a/youmubot-osu/src/lib.rs b/youmubot-osu/src/lib.rs
index 5c4a903..eb451b0 100644
--- a/youmubot-osu/src/lib.rs
+++ b/youmubot-osu/src/lib.rs
@@ -19,6 +19,8 @@ const REQUESTS_PER_MINUTE: usize = 100;
 pub struct Client {
     client: Ratelimit<HTTPClient>,
     key: String,
+
+    rosu: rosu_v2::Osu,
 }
 
 fn vec_try_into<U, T: std::convert::TryFrom<U>>(v: Vec<U>) -> Result<Vec<T>, T::Error> {
@@ -33,13 +35,23 @@ fn vec_try_into<U, T: std::convert::TryFrom<U>>(v: Vec<U>) -> Result<Vec<T>, T::
 
 impl Client {
     /// Create a new client from the given API key.
-    pub fn new(key: String, client: HTTPClient) -> Client {
+    pub async fn new(
+        key: String,
+        client: HTTPClient,
+        client_id: u64,
+        client_secret: impl Into<String>,
+    ) -> Result<Client> {
         let client = Ratelimit::new(
             client,
             REQUESTS_PER_MINUTE,
             std::time::Duration::from_secs(60),
         );
-        Client { client, key }
+        let rosu = rosu_v2::OsuBuilder::new()
+            .client_id(client_id)
+            .client_secret(client_secret)
+            .build()
+            .await?;
+        Ok(Client { client, key, rosu })
     }
 
     pub(crate) async fn build_request(&self, url: &str) -> Result<reqwest::RequestBuilder> {
diff --git a/youmubot/src/main.rs b/youmubot/src/main.rs
index e6ff1e1..c488691 100644
--- a/youmubot/src/main.rs
+++ b/youmubot/src/main.rs
@@ -135,6 +135,7 @@ async fn main() {
         // osu!
         #[cfg(feature = "osu")]
         youmubot_osu::discord::setup(&db_path, &mut data, &mut announcers)
+            .await
             .expect("osu! is initialized");
         // codeforces
         #[cfg(feature = "codeforces")]