diff --git a/crates/shadowsocks/src/relay/tcprelay/aead_2022.rs b/crates/shadowsocks/src/relay/tcprelay/aead_2022.rs
index 5aa9e732..c4a264de 100644
--- a/crates/shadowsocks/src/relay/tcprelay/aead_2022.rs
+++ b/crates/shadowsocks/src/relay/tcprelay/aead_2022.rs
@@ -566,7 +566,8 @@ impl EncryptedWriter {
                     let enc_key = &sub_key[0..16];
                     let cipher = Aes128::new_from_slice(enc_key).expect("AES-128");
 
-                    let ipsk_plain_text = Block::from_slice(ipsk_plain_text);
+                    let ipsk_plain_text =
+                        <&Block as TryFrom<&[u8]>>::try_from(ipsk_plain_text).expect("ipsk length mismatch");
                     let mut block = Block::from([0u8; 16]);
                     cipher.encrypt_block_b2b(ipsk_plain_text, &mut block);
 
@@ -581,7 +582,8 @@ impl EncryptedWriter {
                     let enc_key = &sub_key[0..32];
                     let cipher = Aes256::new_from_slice(enc_key).expect("AES-256");
 
-                    let ipsk_plain_text = Block::from_slice(ipsk_plain_text);
+                    let ipsk_plain_text =
+                        <&Block as TryFrom<&[u8]>>::try_from(ipsk_plain_text).expect("ipsk length mismatch");
                     let mut block = Block::from([0u8; 16]);
                     cipher.encrypt_block_b2b(ipsk_plain_text, &mut block);