diff --git a/tendermint/src/block/header.rs b/tendermint/src/block/header.rs
index 52dfbd3c2..a1c324af4 100644
--- a/tendermint/src/block/header.rs
+++ b/tendermint/src/block/header.rs
@@ -1,15 +1,11 @@
 //! Block headers
 use crate::merkle::simple_hash_from_byte_vectors;
+use crate::serializers;
 use crate::{account, amino_types, block, chain, lite, Hash, Time};
 use amino_types::{message::AminoMessage, BlockId, ConsensusVersion, TimeMsg};
 use serde::{de::Error as _, Deserialize, Deserializer, Serialize};
 use std::str::FromStr;
 
-use {
-    crate::serializers,
-    serde::{Deserialize, Serialize},
-};
-
 /// Block `Header` values contain metadata about the block and about the
 /// consensus, as well as commitments to the data in the current block, the
 /// previous block, and the results returned by the application.
diff --git a/tendermint/src/block/id.rs b/tendermint/src/block/id.rs
index 0ac41e4bc..37ceff027 100644
--- a/tendermint/src/block/id.rs
+++ b/tendermint/src/block/id.rs
@@ -16,7 +16,7 @@ pub const PREFIX_LENGTH: usize = 10;
 /// as well as the number of parts in the block.
 ///
 /// <https://github.com/tendermint/tendermint/blob/master/docs/spec/blockchain/blockchain.md#blockid>
-#[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq, PartialOrd, Ord, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, Hash, Eq, PartialEq, PartialOrd, Ord)]
 pub struct Id {
     /// The block's main hash is the Merkle root of all the fields in the
     /// block header.
diff --git a/tendermint/src/hash.rs b/tendermint/src/hash.rs
index bc9ba0bff..236ee4114 100644
--- a/tendermint/src/hash.rs
+++ b/tendermint/src/hash.rs
@@ -25,12 +25,6 @@ pub enum Hash {
     Sha256([u8; SHA256_HASH_SIZE]),
 }
 
-impl Default for Hash {
-    fn default() -> Hash {
-        Hash::Null
-    }
-}
-
 impl Hash {
     #[allow(clippy::new_ret_no_self)]
     /// Create a new `Hash` with the given algorithm type
diff --git a/tendermint/src/validator.rs b/tendermint/src/validator.rs
index 5f369f22f..6a2307aca 100644
--- a/tendermint/src/validator.rs
+++ b/tendermint/src/validator.rs
@@ -36,7 +36,7 @@ impl lite::ValidatorSet for Set {
             .iter()
             .map(|validator| validator.hash_bytes())
             .collect();
-        Hash::Sha256(merkle::simple_hash_from_byte_slices(validator_bytes))
+        Hash::Sha256(merkle::simple_hash_from_byte_vectors(validator_bytes))
     }
 
     fn total_power(&self) -> u64 {