diff --git a/um_crypto/qmc/src/ekey.rs b/um_crypto/qmc/src/ekey.rs
index 644acb8..26e3881 100644
--- a/um_crypto/qmc/src/ekey.rs
+++ b/um_crypto/qmc/src/ekey.rs
@@ -42,7 +42,7 @@ fn make_simple_key<const N: usize>() -> [u8; N] {
     result
 }
 
-pub fn decrypt_v1(ekey: &[u8]) -> Result<Box<[u8]>> {
+pub fn decrypt_v1(ekey: &[u8]) -> Result<Vec<u8>> {
     if ekey.len() < 12 {
         Err(EKeyDecryptError::EKeyTooShort)?;
     }
@@ -58,10 +58,10 @@ pub fn decrypt_v1(ekey: &[u8]) -> Result<Box<[u8]>> {
         .collect_vec();
 
     let plaintext = tc_tea::decrypt(cipher, tea_key).map_err(EKeyDecryptError::FailDecryptV1)?;
-    Ok([header, &plaintext].concat().into())
+    Ok([header, &plaintext].concat())
 }
 
-pub fn decrypt_v2(ekey: &[u8]) -> Result<Box<[u8]>> {
+pub fn decrypt_v2(ekey: &[u8]) -> Result<Vec<u8>> {
     let ekey = base64::decode(ekey)?;
     let ekey = tc_tea::decrypt(ekey, EKEY_V2_KEY1).map_err(EKeyDecryptError::FailDecryptV2)?;
     let ekey = tc_tea::decrypt(ekey, EKEY_V2_KEY2).map_err(EKeyDecryptError::FailDecryptV2)?;
@@ -70,7 +70,7 @@ pub fn decrypt_v2(ekey: &[u8]) -> Result<Box<[u8]>> {
     decrypt_v1(&ekey)
 }
 
-pub fn decrypt<T: AsRef<[u8]>>(ekey: T) -> Result<Box<[u8]>> {
+pub fn decrypt<T: AsRef<[u8]>>(ekey: T) -> Result<Vec<u8>> {
     let ekey = ekey.as_ref();
     match ekey.strip_prefix(EKEY_V2_PREFIX) {
         Some(v2_ekey) => decrypt_v2(v2_ekey),