diff --git a/Cargo.lock b/Cargo.lock
index 0b277c0..41d7ecb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -760,10 +760,9 @@ dependencies = [
 
 [[package]]
 name = "reqwew"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "bytes",
- "once_cell",
  "reqwest",
  "serde",
  "serde_json",
@@ -1043,18 +1042,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.69"
+version = "2.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+checksum = "c006c85c7651b3cf2ada4584faa36773bd07bac24acfb39f3c431b36d7e667aa"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.69"
+version = "2.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+checksum = "f077553d607adc1caf65430528a576c757a71ed73944b66ebb58ef2bbd243568"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index ec3b0aa..149a198 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ license     = "GPL-3.0"
 name        = "reqwew"
 readme      = "README.md"
 repository  = "https://github.com/hack-ink/reqwew"
-version     = "0.3.1"
+version     = "0.4.0"
 
 [profile.ci-dev]
 incremental = false
@@ -17,14 +17,14 @@ inherits    = "dev"
 
 [dependencies]
 # crates.io
-bytes      = { version = "1.7" }
-once_cell  = { version = "1.19" }
+bytes      = { version = "1.8" }
 reqwest    = { version = "0.12" }
 serde      = { version = "1.0" }
 serde_json = { version = "1.0" }
-thiserror  = { version = "1.0" }
-tokio      = { version = "1.40" }
+thiserror  = { version = "2.0" }
+tokio      = { version = "1.41" }
 tracing    = { version = "0.1" }
 
 [dev-dependencies]
-tokio = { version = "1.40", features = ["macros"] }
+# crates.io
+tokio = { version = "1.41", features = ["macros"] }
diff --git a/src/lib.rs b/src/lib.rs
index b8b28a0..55b7b6f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,14 +7,12 @@ use error::*;
 
 #[cfg(test)] mod test;
 
-pub use once_cell;
 pub use reqwest;
 
 // std
-use std::{future::Future, time::Duration};
+use std::{future::Future, sync::LazyLock, time::Duration};
 // crates.io
 use bytes::Bytes;
-use once_cell::sync::Lazy;
 use reqwest::{Body, Client as RClient, IntoUrl, Method as RMethod};
 use serde::de::DeserializeOwned;
 use tokio::time;
@@ -380,10 +378,14 @@ impl Http for Client {
 ///
 /// # Example
 /// ```rust
-/// use reqwew::{once_cell::sync::Lazy, Client};
+/// use reqwew::Client;
+/// use std::sync::LazyLock;
 ///
-/// pub static CLIENT: Lazy<Client> = reqwew::lazy(|| Client::default());
+/// pub static CLIENT: LazyLock<Client> = reqwew::lazy(|| Client::default());
 /// ```
-pub const fn lazy<F>(f: F) -> Lazy<Client, F> {
-	Lazy::new(f)
+pub const fn lazy<F>(f: F) -> LazyLock<Client, F>
+where
+	F: FnOnce() -> Client,
+{
+	LazyLock::new(f)
 }
diff --git a/src/test.rs b/src/test.rs
index ca7bca8..a22cbed 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -3,7 +3,7 @@ use serde_json::Value;
 // self
 use super::*;
 
-static CLIENT: Lazy<Client> = lazy(Default::default);
+static CLIENT: LazyLock<Client> = lazy(Default::default);
 
 #[tokio::test]
 async fn http_and_response_should_work() {