diff --git a/Cargo.toml b/Cargo.toml
index d89cee194c..8a0e14e3d8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ description = "General purpose library for using and interoperating with Bitcoin
 keywords = [ "crypto", "bitcoin" ]
 readme = "README.md"
 exclude = ["./test_data"]
+edition = "2018"
 
 # Please don't forget to add relevant features to docs.rs below
 [features]
diff --git a/src/blockdata/block.rs b/src/blockdata/block.rs
index f25ca48e0d..85f0fc042c 100644
--- a/src/blockdata/block.rs
+++ b/src/blockdata/block.rs
@@ -508,10 +508,10 @@ mod tests {
 #[cfg(all(test, feature = "unstable"))]
 mod benches {
     use super::Block;
-    use EmptyWrite;
-    use consensus::{deserialize, Encodable};
+    use crate::EmptyWrite;
+    use crate::consensus::{deserialize, Encodable};
     use test::{black_box, Bencher};
-    use network::stream_reader::StreamReader;
+    use crate::network::stream_reader::StreamReader;
 
     #[bench]
     #[allow(deprecated)]
diff --git a/src/blockdata/opcodes.rs b/src/blockdata/opcodes.rs
index 6d1e210325..ef1b054b00 100644
--- a/src/blockdata/opcodes.rs
+++ b/src/blockdata/opcodes.rs
@@ -22,7 +22,7 @@
 
 #[cfg(feature = "serde")] use serde;
 
-#[cfg(feature = "serde")] use prelude::*;
+#[cfg(feature = "serde")] use crate::prelude::*;
 
 use core::{fmt, convert::From};
 
diff --git a/src/blockdata/script.rs b/src/blockdata/script.rs
index 8b2a784d33..7f50ff0493 100644
--- a/src/blockdata/script.rs
+++ b/src/blockdata/script.rs
@@ -617,7 +617,7 @@ impl Script {
     /// Shorthand for [`Self::verify_with_flags`] with flag [bitcoinconsensus::VERIFY_ALL].
     #[cfg(feature="bitcoinconsensus")]
     #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
-    pub fn verify (&self, index: usize, amount: ::Amount, spending: &[u8]) -> Result<(), Error> {
+    pub fn verify (&self, index: usize, amount: crate::Amount, spending: &[u8]) -> Result<(), Error> {
         self.verify_with_flags(index, amount, spending, ::bitcoinconsensus::VERIFY_ALL)
     }
 
@@ -630,7 +630,7 @@ impl Script {
     ///  * `flags` - Verification flags, see [`bitcoinconsensus::VERIFY_ALL`] and similar.
     #[cfg(feature="bitcoinconsensus")]
     #[cfg_attr(docsrs, doc(cfg(feature = "bitcoinconsensus")))]
-    pub fn verify_with_flags<F: Into<u32>>(&self, index: usize, amount: ::Amount, spending: &[u8], flags: F) -> Result<(), Error> {
+    pub fn verify_with_flags<F: Into<u32>>(&self, index: usize, amount: crate::Amount, spending: &[u8], flags: F) -> Result<(), Error> {
         Ok(bitcoinconsensus::verify_with_flags (&self.0[..], amount.as_sat(), spending, index, flags.into())?)
     }
 
@@ -1440,7 +1440,7 @@ mod test {
 		// a random segwit transaction from the blockchain using native segwit
 		let spent = Builder::from(Vec::from_hex("0020701a8d401c84fb13e6baf169d59684e17abd9fa216c8cc5b9fc63d622ff8c58d").unwrap()).into_script();
 		let spending = Vec::from_hex("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").unwrap();
-		spent.verify(0, ::Amount::from_sat(18393430), spending.as_slice()).unwrap();
+		spent.verify(0, crate::Amount::from_sat(18393430), spending.as_slice()).unwrap();
 	}
 
     #[test]
diff --git a/src/blockdata/transaction.rs b/src/blockdata/transaction.rs
index 20e9b2fb90..7beac35cab 100644
--- a/src/blockdata/transaction.rs
+++ b/src/blockdata/transaction.rs
@@ -34,7 +34,7 @@ use crate::hashes::hex::FromHex;
 
 use crate::util::endian;
 use crate::blockdata::constants::WITNESS_SCALE_FACTOR;
-#[cfg(feature="bitcoinconsensus")] use blockdata::script;
+#[cfg(feature="bitcoinconsensus")] use crate::blockdata::script;
 use crate::blockdata::script::Script;
 use crate::blockdata::witness::Witness;
 use crate::consensus::{encode, Decodable, Encodable};
@@ -43,7 +43,7 @@ use crate::hash_types::{Sighash, Txid, Wtxid};
 use crate::VarInt;
 
 #[cfg(doc)]
-use util::sighash::SchnorrSighashType;
+use crate::util::sighash::SchnorrSighashType;
 
 /// Used for signature hash for invalid use of SIGHASH_SINGLE.
 const UINT256_ONE: [u8; 32] = [
@@ -590,7 +590,7 @@ impl Transaction {
         let flags: u32 = flags.into();
         for (idx, input) in self.input.iter().enumerate() {
             if let Some(output) = spent(&input.previous_output) {
-                output.script_pubkey.verify_with_flags(idx, ::Amount::from_sat(output.value), tx.as_slice(), flags)?;
+                output.script_pubkey.verify_with_flags(idx, crate::Amount::from_sat(output.value), tx.as_slice(), flags)?;
             } else {
                 return Err(script::Error::UnknownSpentOutput(input.previous_output.clone()));
             }
@@ -1541,10 +1541,10 @@ mod tests {
     #[test]
     #[cfg(feature="bitcoinconsensus")]
     fn test_transaction_verify () {
-        use hashes::hex::FromHex;
         use std::collections::HashMap;
-        use blockdata::script;
-        use blockdata::witness::Witness;
+        use crate::hashes::hex::FromHex;
+        use crate::blockdata::script;
+        use crate::blockdata::witness::Witness;
 
         // a random recent segwit transaction from blockchain using both old and segwit inputs
         let mut spending: Transaction = deserialize(Vec::from_hex("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")
@@ -1601,9 +1601,9 @@ mod tests {
 #[cfg(all(test, feature = "unstable"))]
 mod benches {
     use super::Transaction;
-    use EmptyWrite;
-    use consensus::{deserialize, Encodable};
-    use hashes::hex::FromHex;
+    use crate::EmptyWrite;
+    use crate::consensus::{deserialize, Encodable};
+    use crate::hashes::hex::FromHex;
     use test::{black_box, Bencher};
 
     const SOME_TX: &'static str = "0100000001a15d57094aa7a21a28cb20b59aab8fc7d1149a3bdbcddba9c622e4f5f6a99ece010000006c493046022100f93bb0e7d8db7bd46e40132d1f8242026e045f03a0efe71bbb8e3f475e970d790221009337cd7f1f929f00cc6ff01f03729b069a7c21b59b1736ddfee5db5946c5da8c0121033b9b137ee87d5a812d6f506efdd37f0affa7ffc310711c06c7f3e097c9447c52ffffffff0100e1f505000000001976a9140389035a9225b3839e2bbf32d826a1e222031fd888ac00000000";
diff --git a/src/hash_types.rs b/src/hash_types.rs
index b4605c2344..94e46792b1 100644
--- a/src/hash_types.rs
+++ b/src/hash_types.rs
@@ -20,7 +20,7 @@
 //! hash).
 //!
 
-use crate::hashes::{Hash, sha256, sha256d, hash160};
+use crate::hashes::{Hash, sha256, sha256d, hash160, hash_newtype};
 
 macro_rules! impl_hashencode {
     ($hashtype:ident) => {
diff --git a/src/internal_macros.rs b/src/internal_macros.rs
index 1edaa30e15..1814420b2e 100644
--- a/src/internal_macros.rs
+++ b/src/internal_macros.rs
@@ -93,11 +93,11 @@ macro_rules! impl_array_newtype {
             }
         }
 
-        impl<I> $crate::core::ops::Index<I> for $thing
+        impl<I> core::ops::Index<I> for $thing
         where
-            [$ty]: $crate::core::ops::Index<I>,
+            [$ty]: core::ops::Index<I>,
         {
-            type Output = <[$ty] as $crate::core::ops::Index<I>>::Output;
+            type Output = <[$ty] as core::ops::Index<I>>::Output;
 
             #[inline]
             fn index(&self, index: I) -> &Self::Output {
diff --git a/src/lib.rs b/src/lib.rs
index 04e50eca35..53820265a1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -190,7 +190,7 @@ mod prelude {
     pub use std::io::sink;
 
     #[cfg(not(feature = "std"))]
-    pub use io_extras::sink;
+    pub use crate::io_extras::sink;
 
     #[cfg(feature = "hashbrown")]
     pub use hashbrown::HashSet;
@@ -204,7 +204,7 @@ mod prelude {
 #[cfg(all(test, feature = "unstable"))]
 mod tests {
     use core::fmt::Arguments;
-    use io::{IoSlice, Result, Write};
+    use crate::io::{IoSlice, Result, Write};
 
     #[derive(Default, Clone, Debug, PartialEq, Eq)]
     pub struct EmptyWrite;
diff --git a/src/serde_utils.rs b/src/serde_utils.rs
index da4011e51e..48b462e928 100644
--- a/src/serde_utils.rs
+++ b/src/serde_utils.rs
@@ -9,14 +9,14 @@ pub mod btreemap_byte_values {
 
     // NOTE: This module can be exactly copied to use with HashMap.
 
-    use prelude::*;
-    use hashes::hex::{FromHex, ToHex};
+    use crate::prelude::*;
+    use crate::hashes::hex::{FromHex, ToHex};
     use serde;
 
     pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
     where
         S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord,
+        T: serde::Serialize + core::hash::Hash + Eq + Ord,
     {
         use serde::ser::SerializeMap;
 
@@ -35,18 +35,18 @@ pub mod btreemap_byte_values {
     pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
     where
         D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+        T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
     {
-        use ::core::marker::PhantomData;
+        use core::marker::PhantomData;
 
         struct Visitor<T>(PhantomData<T>);
         impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
         where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
         {
             type Value = BTreeMap<T, Vec<u8>>;
 
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
                 write!(f, "a map with hexadecimal values")
             }
 
@@ -77,13 +77,13 @@ pub mod btreemap_as_seq {
 
     // NOTE: This module can be exactly copied to use with HashMap.
 
-    use prelude::*;
+    use crate::prelude::*;
     use serde;
 
     pub fn serialize<S, T, U>(v: &BTreeMap<T, U>, s: S) -> Result<S::Ok, S::Error>
     where
         S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord,
+        T: serde::Serialize + core::hash::Hash + Eq + Ord,
         U: serde::Serialize,
     {
         use serde::ser::SerializeSeq;
@@ -103,20 +103,20 @@ pub mod btreemap_as_seq {
     pub fn deserialize<'de, D, T, U>(d: D) -> Result<BTreeMap<T, U>, D::Error>
     where
         D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+        T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
         U: serde::Deserialize<'de>,
     {
-        use ::core::marker::PhantomData;
+        use core::marker::PhantomData;
 
         struct Visitor<T, U>(PhantomData<(T, U)>);
         impl<'de, T, U> serde::de::Visitor<'de> for Visitor<T, U>
         where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
             U: serde::Deserialize<'de>,
         {
             type Value = BTreeMap<T, U>;
 
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
                 write!(f, "a sequence of pairs")
             }
 
@@ -147,14 +147,14 @@ pub mod btreemap_as_seq_byte_values {
 
     // NOTE: This module can be exactly copied to use with HashMap.
 
-    use prelude::*;
+    use crate::prelude::*;
     use serde;
 
     /// A custom key-value pair type that serialized the bytes as hex.
     #[derive(Debug, Deserialize)]
     struct OwnedPair<T>(
         T,
-        #[serde(deserialize_with = "::serde_utils::hex_bytes::deserialize")]
+        #[serde(deserialize_with = "crate::serde_utils::hex_bytes::deserialize")]
         Vec<u8>,
     );
 
@@ -162,14 +162,14 @@ pub mod btreemap_as_seq_byte_values {
     #[derive(Debug, Serialize)]
     struct BorrowedPair<'a, T: 'static>(
         &'a T,
-        #[serde(serialize_with = "::serde_utils::hex_bytes::serialize")]
+        #[serde(serialize_with = "crate::serde_utils::hex_bytes::serialize")]
         &'a [u8],
     );
 
     pub fn serialize<S, T>(v: &BTreeMap<T, Vec<u8>>, s: S) -> Result<S::Ok, S::Error>
     where
         S: serde::Serializer,
-        T: serde::Serialize + ::core::hash::Hash + Eq + Ord + 'static,
+        T: serde::Serialize + core::hash::Hash + Eq + Ord + 'static,
     {
         use serde::ser::SerializeSeq;
 
@@ -188,18 +188,18 @@ pub mod btreemap_as_seq_byte_values {
     pub fn deserialize<'de, D, T>(d: D) -> Result<BTreeMap<T, Vec<u8>>, D::Error>
     where
         D: serde::Deserializer<'de>,
-        T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+        T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
     {
-        use ::core::marker::PhantomData;
+        use core::marker::PhantomData;
 
         struct Visitor<T>(PhantomData<T>);
         impl<'de, T> serde::de::Visitor<'de> for Visitor<T>
         where
-            T: serde::Deserialize<'de> + ::core::hash::Hash + Eq + Ord,
+            T: serde::Deserialize<'de> + core::hash::Hash + Eq + Ord,
         {
             type Value = BTreeMap<T, Vec<u8>>;
 
-            fn expecting(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+            fn expecting(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
                 write!(f, "a sequence of pairs")
             }
 
@@ -246,12 +246,12 @@ pub mod hex_bytes {
     where
         D: serde::Deserializer<'de>, B: serde::Deserialize<'de> + FromHex,
     {
-        struct Visitor<B>(::core::marker::PhantomData<B>);
+        struct Visitor<B>(core::marker::PhantomData<B>);
 
         impl<'de, B: FromHex> serde::de::Visitor<'de> for Visitor<B> {
             type Value = B;
 
-            fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+            fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
                 formatter.write_str("an ASCII hex string")
             }
 
@@ -259,7 +259,7 @@ pub mod hex_bytes {
             where
                 E: serde::de::Error,
             {
-                if let Ok(hex) = ::core::str::from_utf8(v) {
+                if let Ok(hex) = core::str::from_utf8(v) {
                     FromHex::from_hex(hex).map_err(E::custom)
                 } else {
                     return Err(E::invalid_value(serde::de::Unexpected::Bytes(v), &self));
@@ -278,7 +278,7 @@ pub mod hex_bytes {
         if !d.is_human_readable() {
             serde::Deserialize::deserialize(d)
         } else {
-            d.deserialize_str(Visitor(::core::marker::PhantomData))
+            d.deserialize_str(Visitor(core::marker::PhantomData))
         }
     }
 }
diff --git a/src/util/amount.rs b/src/util/amount.rs
index fc99df376f..aa888f8954 100644
--- a/src/util/amount.rs
+++ b/src/util/amount.rs
@@ -1233,7 +1233,7 @@ pub mod serde {
     //! ```
 
     use serde::{Deserialize, Deserializer, Serialize, Serializer};
-    use util::amount::{Amount, Denomination, SignedAmount};
+    use crate::util::amount::{Amount, Denomination, SignedAmount};
 
     /// This trait is used only to avoid code duplication and naming collisions
     /// of the different serde serialization crates.
@@ -1322,7 +1322,7 @@ pub mod serde {
         //! Use with `#[serde(with = "amount::serde::as_sat")]`.
 
         use serde::{Deserializer, Serializer};
-        use util::amount::serde::SerdeAmount;
+        use crate::util::amount::serde::SerdeAmount;
 
         pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
             a.ser_sat(s)
@@ -1337,7 +1337,7 @@ pub mod serde {
             //! Use with `#[serde(default, with = "amount::serde::as_sat::opt")]`.
 
             use serde::{Deserializer, Serializer, de};
-            use util::amount::serde::SerdeAmountForOpt;
+            use crate::util::amount::serde::SerdeAmountForOpt;
             use core::fmt;
             use core::marker::PhantomData;
 
@@ -1386,7 +1386,7 @@ pub mod serde {
         //! Use with `#[serde(with = "amount::serde::as_btc")]`.
 
         use serde::{Deserializer, Serializer};
-        use util::amount::serde::SerdeAmount;
+        use crate::util::amount::serde::SerdeAmount;
 
         pub fn serialize<A: SerdeAmount, S: Serializer>(a: &A, s: S) -> Result<S::Ok, S::Error> {
             a.ser_btc(s)
@@ -1401,7 +1401,7 @@ pub mod serde {
             //! Use with `#[serde(default, with = "amount::serde::as_btc::opt")]`.
 
             use serde::{Deserializer, Serializer, de};
-            use util::amount::serde::SerdeAmountForOpt;
+            use crate::util::amount::serde::SerdeAmountForOpt;
             use core::fmt;
             use core::marker::PhantomData;
 
@@ -1941,9 +1941,9 @@ mod tests {
 
         #[derive(Serialize, Deserialize, PartialEq, Debug)]
         struct T {
-            #[serde(with = "::util::amount::serde::as_sat")]
+            #[serde(with = "crate::util::amount::serde::as_sat")]
             pub amt: Amount,
-            #[serde(with = "::util::amount::serde::as_sat")]
+            #[serde(with = "crate::util::amount::serde::as_sat")]
             pub samt: SignedAmount,
         }
 
@@ -1970,9 +1970,9 @@ mod tests {
 
         #[derive(Serialize, Deserialize, PartialEq, Debug)]
         struct T {
-            #[serde(with = "::util::amount::serde::as_btc")]
+            #[serde(with = "crate::util::amount::serde::as_btc")]
             pub amt: Amount,
-            #[serde(with = "::util::amount::serde::as_btc")]
+            #[serde(with = "crate::util::amount::serde::as_btc")]
             pub samt: SignedAmount,
         }
 
@@ -2004,9 +2004,9 @@ mod tests {
 
         #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
         struct T {
-            #[serde(default, with = "::util::amount::serde::as_btc::opt")]
+            #[serde(default, with = "crate::util::amount::serde::as_btc::opt")]
             pub amt: Option<Amount>,
-            #[serde(default, with = "::util::amount::serde::as_btc::opt")]
+            #[serde(default, with = "crate::util::amount::serde::as_btc::opt")]
             pub samt: Option<SignedAmount>,
         }
 
@@ -2047,9 +2047,9 @@ mod tests {
 
         #[derive(Serialize, Deserialize, PartialEq, Debug, Eq)]
         struct T {
-            #[serde(default, with = "::util::amount::serde::as_sat::opt")]
+            #[serde(default, with = "crate::util::amount::serde::as_sat::opt")]
             pub amt: Option<Amount>,
-            #[serde(default, with = "::util::amount::serde::as_sat::opt")]
+            #[serde(default, with = "crate::util::amount::serde::as_sat::opt")]
             pub samt: Option<SignedAmount>,
         }
 
diff --git a/src/util/misc.rs b/src/util/misc.rs
index f21b75ba33..43659c5a44 100644
--- a/src/util/misc.rs
+++ b/src/util/misc.rs
@@ -34,7 +34,8 @@ pub const BITCOIN_SIGNED_MSG_PREFIX: &[u8] = b"\x18Bitcoin Signed Message:\n";
 
 #[cfg(feature = "secp-recovery")]
 mod message_signing {
-    #[cfg(feature = "base64")] use prelude::*;
+    #[cfg(feature = "base64")] use crate::prelude::*;
+
     use core::fmt;
     #[cfg(feature = "std")] use std::error;
 
@@ -321,7 +322,7 @@ mod tests {
     fn test_message_signature() {
         use core::str::FromStr;
         use secp256k1;
-        use ::AddressType;
+        use crate::{Address, Network, AddressType};
 
         let secp = secp256k1::Secp256k1::new();
         let message = "rust-bitcoin MessageSignature test";
@@ -342,14 +343,14 @@ mod tests {
         assert_eq!(pubkey.compressed, true);
         assert_eq!(pubkey.inner, secp256k1::PublicKey::from_secret_key(&secp, &privkey));
 
-        let p2pkh = ::Address::p2pkh(&pubkey, ::Network::Bitcoin);
+        let p2pkh = Address::p2pkh(&pubkey, Network::Bitcoin);
         assert_eq!(signature2.is_signed_by_address(&secp, &p2pkh, msg_hash), Ok(true));
-        let p2wpkh = ::Address::p2wpkh(&pubkey, ::Network::Bitcoin).unwrap();
+        let p2wpkh = Address::p2wpkh(&pubkey, Network::Bitcoin).unwrap();
         assert_eq!(
             signature2.is_signed_by_address(&secp, &p2wpkh, msg_hash),
             Err(MessageSignatureError::UnsupportedAddressType(AddressType::P2wpkh))
         );
-        let p2shwpkh = ::Address::p2shwpkh(&pubkey, ::Network::Bitcoin).unwrap();
+        let p2shwpkh = Address::p2shwpkh(&pubkey, Network::Bitcoin).unwrap();
         assert_eq!(
             signature2.is_signed_by_address(&secp, &p2shwpkh, msg_hash),
             Err(MessageSignatureError::UnsupportedAddressType(AddressType::P2sh))
@@ -360,7 +361,8 @@ mod tests {
     #[cfg(all(feature = "secp-recovery", feature = "base64"))]
     fn test_incorrect_message_signature() {
         use secp256k1;
-        use util::key::PublicKey;
+        use crate::util::key::PublicKey;
+        use crate::{Address, Network};
 
         let secp = secp256k1::Secp256k1::new();
         let message = "a different message from what was signed";
@@ -376,7 +378,7 @@ mod tests {
             &::base64::decode(&pubkey_base64).expect("base64 string")
         ).expect("pubkey slice");
 
-        let p2pkh = ::Address::p2pkh(&pubkey, ::Network::Bitcoin);
+        let p2pkh = Address::p2pkh(&pubkey, Network::Bitcoin);
         assert_eq!(signature.is_signed_by_address(&secp, &p2pkh, msg_hash), Ok(false));
     }
 }
diff --git a/src/util/psbt/map/input.rs b/src/util/psbt/map/input.rs
index 3969ddaab1..a58c43974b 100644
--- a/src/util/psbt/map/input.rs
+++ b/src/util/psbt/map/input.rs
@@ -102,7 +102,7 @@ pub struct Input {
     pub witness_script: Option<Script>,
     /// A map from public keys needed to sign this input to their corresponding
     /// master key fingerprints and derivation paths.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub bip32_derivation: BTreeMap<secp256k1::PublicKey, KeySource>,
     /// The finalized, fully-constructed scriptSig with signatures and any other
     /// scripts necessary for this input to pass validation.
@@ -112,37 +112,37 @@ pub struct Input {
     pub final_script_witness: Option<Witness>,
     /// TODO: Proof of reserves commitment
     /// RIPEMD160 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub ripemd160_preimages: BTreeMap<ripemd160::Hash, Vec<u8>>,
     /// SHA256 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub sha256_preimages: BTreeMap<sha256::Hash, Vec<u8>>,
     /// HSAH160 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub hash160_preimages: BTreeMap<hash160::Hash, Vec<u8>>,
     /// HAS256 hash to preimage map.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_byte_values"))]
     pub hash256_preimages: BTreeMap<sha256d::Hash, Vec<u8>>,
     /// Serialized schnorr signature with sighash type for key spend.
     pub tap_key_sig: Option<SchnorrSig>,
     /// Map of <xonlypubkey>|<leafhash> with signature.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub tap_script_sigs: BTreeMap<(XOnlyPublicKey, TapLeafHash), SchnorrSig>,
     /// Map of Control blocks to Script version pair.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub tap_scripts: BTreeMap<ControlBlock, (Script, LeafVersion)>,
     /// Map of tap root x only keys to origin info and leaf hashes contained in it.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
     /// Taproot Internal key.
     pub tap_internal_key: Option<XOnlyPublicKey>,
     /// Taproot Merkle root.
     pub tap_merkle_root: Option<TapBranchHash>,
     /// Proprietary key-value pairs for this input.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
     /// Unknown key-value pairs for this input.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub unknown: BTreeMap<raw::Key, Vec<u8>>,
 }
 
diff --git a/src/util/psbt/map/output.rs b/src/util/psbt/map/output.rs
index 4c918e45e5..750245513a 100644
--- a/src/util/psbt/map/output.rs
+++ b/src/util/psbt/map/output.rs
@@ -56,25 +56,25 @@ pub struct Output {
     pub witness_script: Option<Script>,
     /// A map from public keys needed to spend this output to their
     /// corresponding master key fingerprints and derivation paths.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub bip32_derivation: BTreeMap<secp256k1::PublicKey, KeySource>,
     /// The internal pubkey.
     pub tap_internal_key: Option<XOnlyPublicKey>,
     /// Taproot Output tree.
     pub tap_tree: Option<TapTree>,
     /// Map of tap root x only keys to origin info and leaf hashes contained in it.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq"))]
     pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
     /// Proprietary key-value pairs for this output.
     #[cfg_attr(
         feature = "serde",
-        serde(with = "::serde_utils::btreemap_as_seq_byte_values")
+        serde(with = "crate::serde_utils::btreemap_as_seq_byte_values")
     )]
     pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
     /// Unknown key-value pairs for this output.
     #[cfg_attr(
         feature = "serde",
-        serde(with = "::serde_utils::btreemap_as_seq_byte_values")
+        serde(with = "crate::serde_utils::btreemap_as_seq_byte_values")
     )]
     pub unknown: BTreeMap<raw::Key, Vec<u8>>,
 }
diff --git a/src/util/psbt/mod.rs b/src/util/psbt/mod.rs
index 14950fa634..677bc4c36b 100644
--- a/src/util/psbt/mod.rs
+++ b/src/util/psbt/mod.rs
@@ -62,10 +62,10 @@ pub struct PartiallySignedTransaction {
     /// derivation path as defined by BIP 32
     pub xpub: BTreeMap<ExtendedPubKey, KeySource>,
     /// Global proprietary key-value pairs.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub proprietary: BTreeMap<raw::ProprietaryKey, Vec<u8>>,
     /// Unknown global key-value pairs.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq_byte_values"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::btreemap_as_seq_byte_values"))]
     pub unknown: BTreeMap<raw::Key, Vec<u8>>,
 
     /// The corresponding key-value map for each input in the unsigned
@@ -219,8 +219,8 @@ mod display_from_str {
     use super::PartiallySignedTransaction;
     use core::fmt::{Display, Formatter, self};
     use core::str::FromStr;
-    use consensus::encode::{Error, self};
-    use ::base64::display::Base64Display;
+    use crate::consensus::encode::{Error, self};
+    use base64::display::Base64Display;
 
     /// Error happening during PSBT decoding from Base64 string
     #[derive(Debug)]
@@ -496,8 +496,8 @@ mod tests {
     fn test_serde_psbt() {
         //! Create a full PSBT value with various fields filled and make sure it can be JSONized.
         use hashes::sha256d;
-        use util::psbt::map::Input;
-        use EcdsaSighashType;
+        use crate::util::psbt::map::Input;
+        use crate::EcdsaSighashType;
 
         // create some values to use in the PSBT
         let tx = Transaction {
@@ -632,7 +632,7 @@ mod tests {
         #[test]
         #[should_panic(expected = "ConsensusEncoding")]
         fn invalid_vector_2_base64() {
-            use util::psbt::PsbtParseError;
+            use crate::util::psbt::PsbtParseError;
             PartiallySignedTransaction::from_str("cHNidP8BAHUCAAAAASaBcTce3/KF6Tet7qSze3gADAVmy7OtZGQXE8pCFxv2AAAAAAD+////AtPf9QUAAAAAGXapFNDFmQPFusKGh2DpD9UhpGZap2UgiKwA4fUFAAAAABepFDVF5uM7gyxHBQ8k0+65PJwDlIvHh7MuEwAAAQD9pQEBAAAAAAECiaPHHqtNIOA3G7ukzGmPopXJRjr6Ljl/hTPMti+VZ+UBAAAAFxYAFL4Y0VKpsBIDna89p95PUzSe7LmF/////4b4qkOnHf8USIk6UwpyN+9rRgi7st0tAXHmOuxqSJC0AQAAABcWABT+Pp7xp0XpdNkCxDVZQ6vLNL1TU/////8CAMLrCwAAAAAZdqkUhc/xCX/Z4Ai7NK9wnGIZeziXikiIrHL++E4sAAAAF6kUM5cluiHv1irHU6m80GfWx6ajnQWHAkcwRAIgJxK+IuAnDzlPVoMR3HyppolwuAJf3TskAinwf4pfOiQCIAGLONfc0xTnNMkna9b7QPZzMlvEuqFEyADS8vAtsnZcASED0uFWdJQbrUqZY3LLh+GFbTZSYG2YVi/jnF6efkE/IQUCSDBFAiEA0SuFLYXc2WHS9fSrZgZU327tzHlMDDPOXMMJ/7X85Y0CIGczio4OFyXBl/saiK9Z9R5E5CVbIBZ8hoQDHAXR8lkqASECI7cr7vCWXRC+B3jv7NYfysb3mk6haTkzgHNEZPhPKrMAAAAAAA==")
                 // This weird thing is necessary since rustc 0.29 prints out I/O error in a different format than later versions
                 .map_err(|err| match err {
diff --git a/src/util/psbt/raw.rs b/src/util/psbt/raw.rs
index e3de46b5ca..cf7883527f 100644
--- a/src/util/psbt/raw.rs
+++ b/src/util/psbt/raw.rs
@@ -34,7 +34,7 @@ pub struct Key {
     /// The type of this PSBT key.
     pub type_value: u8,
     /// The key itself in raw byte form.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
     pub key: Vec<u8>,
 }
 
@@ -45,7 +45,7 @@ pub struct Pair {
     /// The key of this key-value pair.
     pub key: Key,
     /// The value of this key-value pair in raw byte form.
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
     pub value: Vec<u8>,
 }
 
@@ -59,12 +59,12 @@ pub type ProprietaryType = u8;
 pub struct ProprietaryKey<Subtype=ProprietaryType> where Subtype: Copy + From<u8> + Into<u8> {
     /// Proprietary type prefix used for grouping together keys under some
     /// application and avoid namespace collision
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
     pub prefix: Vec<u8>,
     /// Custom proprietary subtype
     pub subtype: Subtype,
     /// Additional key bytes (like serialized public key data etc)
-    #[cfg_attr(feature = "serde", serde(with = "::serde_utils::hex_bytes"))]
+    #[cfg_attr(feature = "serde", serde(with = "crate::serde_utils::hex_bytes"))]
     pub key: Vec<u8>,
 }
 
diff --git a/src/util/taproot.rs b/src/util/taproot.rs
index ba90e10a8a..1b459665f8 100644
--- a/src/util/taproot.rs
+++ b/src/util/taproot.rs
@@ -402,7 +402,7 @@ impl TaprootBuilder {
     /// If the script weight calculations overflow, a sub-optimal tree may be generated. This should
     /// not happen unless you are dealing with billions of branches with weights close to 2^32.
     ///
-    /// [`TapTree`]: ::util::psbt::TapTree
+    /// [`TapTree`]: crate::util::psbt::TapTree
     pub fn with_huffman_tree<I>(
         script_weights: I,
     ) -> Result<Self, TaprootBuilderError>
@@ -808,7 +808,7 @@ impl ControlBlock {
     /// Serializes the control block.
     ///
     /// This would be required when using [`ControlBlock`] as a witness element while spending an
-    /// output via script path. This serialization does not include the [`::VarInt`] prefix that would
+    /// output via script path. This serialization does not include the [`crate::VarInt`] prefix that would
     /// be applied when encoding this element as a witness.
     pub fn serialize(&self) -> Vec<u8> {
         let mut buf = Vec::with_capacity(self.size());