diff --git a/app-libs/stf/src/evm_helpers.rs b/app-libs/stf/src/evm_helpers.rs
index a06f948544..5280ea5f0e 100644
--- a/app-libs/stf/src/evm_helpers.rs
+++ b/app-libs/stf/src/evm_helpers.rs
@@ -49,7 +49,7 @@ pub fn evm_create_address(caller: H160, nonce: Index) -> H160 {
 // FIXME: Once events are available, these addresses should be read from events.
 pub fn evm_create2_address(caller: H160, salt: H256, code_hash: H256) -> H160 {
 	let mut hasher = Keccak256::new();
-	hasher.update(&[0xff]);
+	hasher.update([0xff]);
 	hasher.update(&caller[..]);
 	hasher.update(&salt[..]);
 	hasher.update(&code_hash[..]);
@@ -57,7 +57,7 @@ pub fn evm_create2_address(caller: H160, salt: H256, code_hash: H256) -> H160 {
 }
 
 pub fn create_code_hash(code: &[u8]) -> H256 {
-	H256::from_slice(Keccak256::digest(&code).as_slice())
+	H256::from_slice(Keccak256::digest(code).as_slice())
 }
 
 pub fn get_evm_account(account: &AccountId) -> H160 {