diff --git a/Cargo.toml b/Cargo.toml
index ae196b4..8c54d1e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "aes-gcm-stream"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 authors = ["Hatter Jiang"]
 repository = "https://git.hatter.ink/hatter/aes-gcm-stream"
@@ -13,9 +13,9 @@ categories = ["cryptography"]
 
 [dependencies]
 aes = { version = "0.8.3", features = ["zeroize"] }
-hex = "0.4.3"
 zeroize = { version = "1.6.0", features = ["zeroize_derive"] }
 
 [dev-dependencies]
+hex = "0.4.3"
 aes-gcm = { version = "0.10.2", features = ["zeroize"] }
 benchmark-simple = "0.1.8"
diff --git a/src/decryptor.rs b/src/decryptor.rs
index 8025150..2a7b244 100644
--- a/src/decryptor.rs
+++ b/src/decryptor.rs
@@ -115,8 +115,8 @@ impl $module {
         let message_tag = &self.message_buffer[message_buffer_len - 16..];
 
         if message_tag != tag.as_slice() {
-            Err(format!("Tag mismatch, expected: {}, actual: {}",
-                        hex::encode(&tag), hex::encode(message_tag)))
+            Err(format!("Tag mismatch, expected: {:2x}, actual: {:2x}",
+                        u8to128(&tag), u8to128(message_tag)))
         } else {
             Ok(plaintext_message)
         }