diff --git a/bitcoin/src/bip152.rs b/bitcoin/src/bip152.rs
index 2b81a1cd..aa8b90dd 100644
--- a/bitcoin/src/bip152.rs
+++ b/bitcoin/src/bip152.rs
@@ -284,7 +284,7 @@ impl Decodable for BlockTransactionsRequest {
                 // Since the number of indices ultimately represent transactions,
                 // we can limit the number of indices to the maximum number of
                 // transactions that would be allowed in a vector.
-                let byte_size = (nb_indexes as usize)
+                let byte_size = (nb_indexes)
                     .checked_mul(mem::size_of::<Transaction>())
                     .ok_or(encode::Error::ParseFailed("Invalid length"))?;
                 if byte_size > encode::MAX_VEC_SIZE {
diff --git a/bitcoin/src/bip32.rs b/bitcoin/src/bip32.rs
index dcb9dbc7..f631f4b7 100644
--- a/bitcoin/src/bip32.rs
+++ b/bitcoin/src/bip32.rs
@@ -627,7 +627,7 @@ impl ExtendedPrivKey {
                 Network::Testnet | Network::Signet | Network::Regtest => [0x04, 0x35, 0x83, 0x94],
             }[..],
         );
-        ret[4] = self.depth as u8;
+        ret[4] = self.depth;
         ret[5..9].copy_from_slice(&self.parent_fingerprint[..]);
         ret[9..13].copy_from_slice(&u32::from(self.child_number).to_be_bytes());
         ret[13..45].copy_from_slice(&self.chain_code[..]);
@@ -759,7 +759,7 @@ impl ExtendedPubKey {
                 Network::Testnet | Network::Signet | Network::Regtest => [0x04u8, 0x35, 0x87, 0xCF],
             }[..],
         );
-        ret[4] = self.depth as u8;
+        ret[4] = self.depth;
         ret[5..9].copy_from_slice(&self.parent_fingerprint[..]);
         ret[9..13].copy_from_slice(&u32::from(self.child_number).to_be_bytes());
         ret[13..45].copy_from_slice(&self.chain_code[..]);
diff --git a/bitcoin/src/blockdata/script.rs b/bitcoin/src/blockdata/script.rs
index 7628da14..8cb8c76f 100644
--- a/bitcoin/src/blockdata/script.rs
+++ b/bitcoin/src/blockdata/script.rs
@@ -443,7 +443,7 @@ impl Script {
     pub fn is_empty(&self) -> bool { self.0.is_empty() }
 
     /// Returns the script data as a byte slice.
-    pub fn as_bytes(&self) -> &[u8] { &*self.0 }
+    pub fn as_bytes(&self) -> &[u8] { &self.0 }
 
     /// Returns a copy of the script data.
     pub fn to_bytes(&self) -> Vec<u8> { self.0.clone().into_vec() }
diff --git a/bitcoin/src/blockdata/transaction.rs b/bitcoin/src/blockdata/transaction.rs
index bf4c794b..1581587c 100644
--- a/bitcoin/src/blockdata/transaction.rs
+++ b/bitcoin/src/blockdata/transaction.rs
@@ -165,7 +165,7 @@ impl core::str::FromStr for OutPoint {
             return Err(ParseOutPointError::TooLong);
         }
         let find = s.find(':');
-        if find == None || find != s.rfind(':') {
+        if find.is_none() || find != s.rfind(':') {
             return Err(ParseOutPointError::Format);
         }
         let colon = find.unwrap();
diff --git a/bitcoin/src/blockdata/witness.rs b/bitcoin/src/blockdata/witness.rs
index 40311121..c559e580 100644
--- a/bitcoin/src/blockdata/witness.rs
+++ b/bitcoin/src/blockdata/witness.rs
@@ -179,7 +179,7 @@ impl Witness {
 
     /// Returns the number of elements this witness holds
     pub fn len(&self) -> usize {
-        self.witness_elements as usize
+        self.witness_elements
     }
 
     /// Returns the bytes required when this Witness is consensus encoded
diff --git a/bitcoin/src/consensus/encode.rs b/bitcoin/src/consensus/encode.rs
index 73b07f7e..20f9d306 100644
--- a/bitcoin/src/consensus/encode.rs
+++ b/bitcoin/src/consensus/encode.rs
@@ -423,7 +423,7 @@ impl Encodable for VarInt {
             },
             _ => {
                 w.emit_u8(0xFF)?;
-                (self.0 as u64).consensus_encode(w)?;
+                self.0.consensus_encode(w)?;
                 Ok(9)
             },
         }
diff --git a/bitcoin/src/pow.rs b/bitcoin/src/pow.rs
index f267d349..be0730e4 100644
--- a/bitcoin/src/pow.rs
+++ b/bitcoin/src/pow.rs
@@ -198,7 +198,7 @@ impl Target {
             size += 1;
         }
 
-        CompactTarget(compact | (size << 24) as u32)
+        CompactTarget(compact | (size << 24))
     }
 
     /// Returns true if block hash is less than or equal to this [`Target`].
diff --git a/bitcoin/src/sign_message.rs b/bitcoin/src/sign_message.rs
index f85795a1..6094e9a1 100644
--- a/bitcoin/src/sign_message.rs
+++ b/bitcoin/src/sign_message.rs
@@ -281,9 +281,8 @@ mod tests {
         let signature =
             super::MessageSignature::from_base64(signature_base64).expect("message signature");
 
-        let pubkey =
-            PublicKey::from_slice(&::base64::decode(&pubkey_base64).expect("base64 string"))
-                .expect("pubkey slice");
+        let pubkey = PublicKey::from_slice(&base64::decode(pubkey_base64).expect("base64 string"))
+            .expect("pubkey slice");
 
         let p2pkh = Address::p2pkh(&pubkey, Network::Bitcoin);
         assert_eq!(signature.is_signed_by_address(&secp, &p2pkh, msg_hash), Ok(false));