diff --git a/eth2/utils/bls/src/signature.rs b/eth2/utils/bls/src/signature.rs
index 7c7f677d78..7a2bc60519 100644
--- a/eth2/utils/bls/src/signature.rs
+++ b/eth2/utils/bls/src/signature.rs
@@ -1,9 +1,8 @@
 use super::{PublicKey, SecretKey, BLS_SIG_BYTE_SIZE};
-use hex::encode as hex_encode;
 use milagro_bls::Signature as RawSignature;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
-use serde_hex::HexVisitor;
+use serde_hex::{encode as hex_encode, HexVisitor};
 use ssz::{ssz_encode, Decode, DecodeError, Encode};
 
 /// A single BLS signature.