diff --git a/Cargo.toml b/Cargo.toml
index 3bf1857..7c502eb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "aes-gcm-stream"
-version = "0.1.2"
+version = "0.2.0"
 edition = "2021"
 authors = ["Hatter Jiang"]
 repository = "https://git.hatter.ink/hatter/aes-gcm-stream"
@@ -16,9 +16,7 @@ aes = { version = "0.8.3", features = ["zeroize"] }
 ghash = "0.5.0"
 zeroize = { version = "1.6.0", features = ["zeroize_derive"] }
 
-hex = "0.4.3"
-
 [dev-dependencies]
-#hex = "0.4.3"
+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 a51e24a..2a7b244 100644
--- a/src/decryptor.rs
+++ b/src/decryptor.rs
@@ -42,7 +42,6 @@ impl $module {
             message_len: 0,
         };
         let (ghash_key, normalized_nonce) = s.normalize_nonce(nonce);
-        println!("<<< KEY: {}", hex::encode(ghash_key.to_be_bytes()));
         s.ghash_key = ghash_key;
         s.init_nonce = normalized_nonce;
         s.encryption_nonce = normalized_nonce;
@@ -127,9 +126,7 @@ impl $module {
         let mut bs = self.init_nonce.to_be_bytes().clone();
         let block = Block::<$aesn>::from_mut_slice(&mut bs);
         self.crypto.encrypt_block(block);
-        println!("<<< final enc block: {}", hex::encode(&block.as_slice()));
         let tag_trunk = self.ghash_val.to_be_bytes();
-        println!("<<< final block: {}", hex::encode(&tag_trunk));
         let y = u8to128(&tag_trunk) ^ u8to128(&block.as_slice());
         y.to_be_bytes().to_vec()
     }
@@ -141,7 +138,6 @@ impl $module {
             let blocks_count = integrality_buffer_slice_len / 16;
             for i in 0..blocks_count {
                 let buf = &integrality_buffer_slice[i * 16..(i + 1) * 16];
-                println!("<<< block: {}", hex::encode(buf));
                 self.ghash_val = gmul_128(self.ghash_val ^ u8to128(buf), self.ghash_key)
             }
             self.integrality_buffer = integrality_buffer_slice[blocks_count * 16..].to_vec();