diff --git a/.vscode/settings.json b/.vscode/settings.json
index e81e605..0de10f5 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -4,7 +4,6 @@
   "rust-analyzer.cargo.features": ["pure"],
   "rust-analyzer.cargo.noDefaultFeatures": true,
   "rust-analyzer.procMacro.enable": true,
-  "rust-analyzer.cargo.loadOutDirsFromCheck": true,
   "spellright.ignoreFiles": [
     "~/.cargo/",
     "~/.rustup/",
diff --git a/.vscode/spellright.dict b/.vscode/spellright.dict
index 6be03f8..bc69730 100644
--- a/.vscode/spellright.dict
+++ b/.vscode/spellright.dict
@@ -26,3 +26,5 @@ typenum
 rs
 ecc
 rt
+js
+getrandom
diff --git a/Cargo.toml b/Cargo.toml
index 80e9d7b..5a200e5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.2.1"
 # docs
 authors = ["Weiliang Li <to.be.impressive@gmail.com>"]
 description = "Elliptic Curve Integrated Encryption Scheme for secp256k1 in Rust"
-edition = "2018"
+edition = "2021"
 keywords = [
   "secp256k1",
   "crypto",
@@ -21,8 +21,8 @@ repository = "https://github.com/ecies/rs"
 
 [dependencies]
 hkdf = "0.11.0"
-secp256k1 = { package = "libsecp256k1", version = "0.6" }
-sha2 = "0.9.2"
+libsecp256k1 = "0.7.0"
+sha2 = "0.9.8"
 
 # openssl aes
 openssl = {version = "0.10.32", optional = true}
@@ -32,10 +32,11 @@ aes-gcm = {version = "0.9.0", optional = true}
 typenum = {version = "1.12.0", optional = true}
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-rand = {version = "0.7.3", features = ["wasm-bindgen"]}
+getrandom = {version = "0.2.3", features = ["js"]}
+rand = {version = "0.8.4", features = ["getrandom"]}
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-rand = {version = "0.7.3"}
+rand = {version = "0.8.4"}
 
 [features]
 default = ["openssl"]
@@ -46,12 +47,12 @@ criterion = "0.3.3"
 hex = "0.4.2"
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
-wasm-bindgen-test = "0.3.19"
+wasm-bindgen-test = "0.3.28"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
-futures-util = "0.3.8"
-reqwest = "0.11.0"
-tokio = {version = "1.0.1", features = ["rt-multi-thread"]}
+futures-util = "0.3.17"
+reqwest = "0.11.6"
+tokio = {version = "1.13.0", features = ["rt-multi-thread"]}
 
 [[bench]]
 harness = false
diff --git a/src/lib.rs b/src/lib.rs
index 57be6d9..ec99031 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -50,7 +50,7 @@
 //!
 //! It's also possible to build to the `wasm32-unknown-unknown` target with the pure Rust backend. Check out [this repo](https://github.com/ecies/rs-wasm) for more details.
 
-pub use secp256k1::{util::FULL_PUBLIC_KEY_SIZE, Error as SecpError, PublicKey, SecretKey};
+pub use libsecp256k1::{util::FULL_PUBLIC_KEY_SIZE, Error as SecpError, PublicKey, SecretKey};
 
 /// Constant variables
 pub mod consts;
diff --git a/src/openssl_aes.rs b/src/openssl_aes.rs
index 16fb0d4..e40b0e1 100644
--- a/src/openssl_aes.rs
+++ b/src/openssl_aes.rs
@@ -36,5 +36,5 @@ pub fn aes_decrypt(key: &[u8], encrypted_msg: &[u8]) -> Option<Vec<u8>> {
     let tag = &encrypted_msg[AES_IV_LENGTH..AES_IV_PLUS_TAG_LENGTH];
     let encrypted = &encrypted_msg[AES_IV_PLUS_TAG_LENGTH..];
 
-    decrypt_aead(cipher, key, Some(&iv), &EMPTY_BYTES, encrypted, tag).ok()
+    decrypt_aead(cipher, key, Some(iv), &EMPTY_BYTES, encrypted, tag).ok()
 }
diff --git a/src/utils.rs b/src/utils.rs
index 17d9604..20e53e5 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,6 +1,6 @@
 use hkdf::Hkdf;
+use libsecp256k1::{util::FULL_PUBLIC_KEY_SIZE, Error as SecpError, PublicKey, SecretKey};
 use rand::thread_rng;
-use secp256k1::{util::FULL_PUBLIC_KEY_SIZE, Error as SecpError, PublicKey, SecretKey};
 use sha2::Sha256;
 
 use crate::consts::EMPTY_BYTES;
@@ -15,16 +15,16 @@ pub use crate::openssl_aes::{aes_decrypt, aes_encrypt};
 /// Generate a `(SecretKey, PublicKey)` pair
 pub fn generate_keypair() -> (SecretKey, PublicKey) {
     let sk = SecretKey::random(&mut thread_rng());
-    (sk.clone(), PublicKey::from_secret_key(&sk))
+    (sk, PublicKey::from_secret_key(&sk))
 }
 
 /// Calculate a shared AES key of our secret key and peer's public key by hkdf
 pub fn encapsulate(sk: &SecretKey, peer_pk: &PublicKey) -> Result<AesKey, SecpError> {
-    let mut shared_point = peer_pk.clone();
-    shared_point.tweak_mul_assign(&sk)?;
+    let mut shared_point = *peer_pk;
+    shared_point.tweak_mul_assign(sk)?;
 
     let mut master = Vec::with_capacity(FULL_PUBLIC_KEY_SIZE * 2);
-    master.extend(PublicKey::from_secret_key(&sk).serialize().iter());
+    master.extend(PublicKey::from_secret_key(sk).serialize().iter());
     master.extend(shared_point.serialize().iter());
 
     hkdf_sha256(master.as_slice())
@@ -32,8 +32,8 @@ pub fn encapsulate(sk: &SecretKey, peer_pk: &PublicKey) -> Result<AesKey, SecpEr
 
 /// Calculate a shared AES key of our public key and peer's secret key by hkdf
 pub fn decapsulate(pk: &PublicKey, peer_sk: &SecretKey) -> Result<AesKey, SecpError> {
-    let mut shared_point = pk.clone();
-    shared_point.tweak_mul_assign(&peer_sk)?;
+    let mut shared_point = *pk;
+    shared_point.tweak_mul_assign(peer_sk)?;
 
     let mut master = Vec::with_capacity(FULL_PUBLIC_KEY_SIZE * 2);
     master.extend(pk.serialize().iter());
@@ -55,8 +55,8 @@ fn hkdf_sha256(master: &[u8]) -> Result<AesKey, SecpError> {
 pub(crate) mod tests {
     use hex::decode;
 
+    use libsecp256k1::Error;
     use rand::{thread_rng, Rng};
-    use secp256k1::Error;
 
     use super::*;
     use crate::consts::{AES_IV_LENGTH, EMPTY_BYTES};