diff --git a/um_crypto/kgm/src/header.rs b/um_crypto/kgm/src/header.rs
index b1ef1eb..db78a1e 100644
--- a/um_crypto/kgm/src/header.rs
+++ b/um_crypto/kgm/src/header.rs
@@ -55,8 +55,8 @@ impl Header {
         };
 
         let decipher: Box<dyn Decipher> = match self.crypto_version {
-            2 => Box::from(DecipherV2::new(self, slot_key)?),
-            3 => Box::from(DecipherV3::new(self, slot_key)?),
+            2 => Box::new(DecipherV2::new(self, slot_key)?),
+            3 => Box::new(DecipherV3::new(self, slot_key)?),
             version => Err(KugouError::UnsupportedCipherVersion(version))?,
         };