diff --git a/Cargo.lock b/Cargo.lock
index 9fd1913..b9cb670 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,6 +17,12 @@ version = "1.0.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ad32ce52e4161730f7098c077cd2ed6229b5804ccf99e5366be1ab72a98b4e1"
 
+[[package]]
+name = "arrayvec"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
+
 [[package]]
 name = "ascii"
 version = "1.1.0"
@@ -29,6 +35,16 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "base58ck"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c8d66485a3a2ea485c1913c4572ce0256067a5377ac8c75c4960e1cda98605f"
+dependencies = [
+ "bitcoin-internals",
+ "bitcoin_hashes",
+]
+
 [[package]]
 name = "base64"
 version = "0.13.1"
@@ -37,9 +53,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "bech32"
-version = "0.10.0-beta"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98f7eed2b2781a6f0b5c903471d48e15f56fb4e1165df8a9a2337fd1a59d45ea"
+checksum = "d965446196e3b7decd44aa7ee49e31d630118f90ef12f97900f262eb915c951d"
 
 [[package]]
 name = "bindgen"
@@ -63,12 +79,15 @@ dependencies = [
 
 [[package]]
 name = "bitcoin"
-version = "0.31.2"
+version = "0.32.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c85783c2fe40083ea54a33aa2f0ba58831d90fcd190f5bdc47e74e84d2a96ae"
+checksum = "7170e7750a20974246f17ece04311b4205a6155f1db564c5b224af817663c3ea"
 dependencies = [
+ "base58ck",
  "bech32",
  "bitcoin-internals",
+ "bitcoin-io",
+ "bitcoin-units",
  "bitcoin_hashes",
  "hex-conservative",
  "hex_lit",
@@ -78,13 +97,19 @@ dependencies = [
 
 [[package]]
 name = "bitcoin-internals"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9425c3bf7089c983facbae04de54513cce73b41c7f9ff8c845b54e7bc64ebbfb"
+checksum = "30bdbe14aa07b06e6cfeffc529a1f099e5fbe249524f8125358604df99a4bed2"
 dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bitcoin-io"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "340e09e8399c7bd8912f495af6aa58bea0c9214773417ffaa8f6460f93aaee56"
+
 [[package]]
 name = "bitcoin-test-data"
 version = "0.2.0"
@@ -92,21 +117,31 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c188654f9dce3bc6ce1bfa9c49777ad514bcad37e421b5f53e9d0ee10603f34"
 
 [[package]]
-name = "bitcoin_hashes"
-version = "0.13.0"
+name = "bitcoin-units"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1930a4dabfebb8d7d9992db18ebe3ae2876f0a305fab206fd168df931ede293b"
+checksum = "cb54da0b28892f3c52203a7191534033e051b6f4b52bc15480681b57b7e036f5"
 dependencies = [
  "bitcoin-internals",
+ "serde",
+]
+
+[[package]]
+name = "bitcoin_hashes"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb18c03d0db0247e147a21a6faafd5a7eb851c743db062de72018b6b7e8e4d16"
+dependencies = [
+ "bitcoin-io",
  "hex-conservative",
  "serde",
 ]
 
 [[package]]
 name = "bitcoin_slices"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b221249ba4685e0f737f0df2c7bb656d527fdd8ede83ac066c4c8ce95898f42"
+checksum = "b8041a1be831c809ada090db2e3bd1469c65b72321bb2f31d7f56261eefc8321"
 dependencies = [
  "bitcoin",
  "bitcoin_hashes",
@@ -115,9 +150,9 @@ dependencies = [
 
 [[package]]
 name = "bitcoincore-rpc"
-version = "0.18.0"
+version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8eb70725a621848c83b3809913d5314c0d20ca84877d99dd909504b564edab00"
+checksum = "aedd23ae0fd321affb4bbbc36126c6f49a32818dc6b979395d24da8c9d4e80ee"
 dependencies = [
  "bitcoincore-rpc-json",
  "jsonrpc",
@@ -128,9 +163,9 @@ dependencies = [
 
 [[package]]
 name = "bitcoincore-rpc-json"
-version = "0.18.0"
+version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "856ffbee2e492c23bca715d72ea34aae80d58400f2bda26a82015d6bc2ec3662"
+checksum = "d8909583c5fab98508e80ef73e5592a651c954993dc6b7739963257d19f0e71a"
 dependencies = [
  "bitcoin",
  "serde",
@@ -486,9 +521,12 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "hex-conservative"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30ed443af458ccb6d81c1e7e661545f94d3176752fb1df2f543b902a1e0f51e2"
+checksum = "e1aa273bf451e37ed35ced41c71a5e2a4e29064afb104158f2514bcd71c2c986"
+dependencies = [
+ "arrayvec",
+]
 
 [[package]]
 name = "hex_lit"
@@ -547,11 +585,12 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc"
-version = "0.14.1"
+version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8128f36b47411cd3f044be8c1f5cc0c9e24d1d1bfdc45f0a57897b32513053f2"
+checksum = "3662a38d341d77efecb73caf01420cfa5aa63c0253fd7bc05289ef9f6616e1bf"
 dependencies = [
  "base64",
+ "minreq",
  "serde",
  "serde_json",
 ]
@@ -655,6 +694,17 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
+[[package]]
+name = "minreq"
+version = "2.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fdef521c74c2884a4f3570bcdb6d2a77b3c533feb6b27ac2ae72673cc221c64"
+dependencies = [
+ "log",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -912,9 +962,9 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "secp256k1"
-version = "0.28.2"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d24b59d129cdadea20aea4fb2352fa053712e5d713eee47d700cd4b2bc002f10"
+checksum = "0e0cc0f1cf93f4969faf3ea1c7d8a9faed25918d96affa959720823dfe86d4f3"
 dependencies = [
  "bitcoin_hashes",
  "rand",
@@ -924,9 +974,9 @@ dependencies = [
 
 [[package]]
 name = "secp256k1-sys"
-version = "0.9.2"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5d1746aae42c19d583c3c1a8c646bfad910498e2051c551a7f2e3c0c9fbb7eb"
+checksum = "1433bd67156263443f14d603720b082dd3121779323fce20cba2aa07b874bc1b"
 dependencies = [
  "cc",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 69c24ec..a156cd0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,9 +22,9 @@ spec = "internal/config_specification.toml"
 
 [dependencies]
 anyhow = "1.0"
-bitcoin = { version = "0.31.2", features = ["serde", "rand-std"] }
-bitcoin_slices = { version = "0.7", features = ["bitcoin", "sha2"] }
-bitcoincore-rpc = { version = "0.18" }
+bitcoin = { version = "0.32.0", features = ["serde", "rand-std"] }
+bitcoin_slices = { version = "0.8", features = ["bitcoin", "sha2"] }
+bitcoincore-rpc = { version = "0.19.0" }
 configure_me = "0.4"
 crossbeam-channel = "0.5"
 dirs-next = "2.0"
diff --git a/src/daemon.rs b/src/daemon.rs
index 970580e..df22173 100644
--- a/src/daemon.rs
+++ b/src/daemon.rs
@@ -6,7 +6,7 @@ use bitcoincore_rpc::{json, jsonrpc, Auth, Client, RpcApi};
 use crossbeam_channel::Receiver;
 use parking_lot::Mutex;
 use serde::Serialize;
-use serde_json::{json, Value};
+use serde_json::{json, value::RawValue, Value};
 
 use std::fs::File;
 use std::io::Read;
@@ -309,13 +309,13 @@ where
     T: Serialize,
 {
     debug!("calling {} on {} items", name, items.len());
-    let args: Vec<_> = items
+    let args: Vec<Box<RawValue>> = items
         .iter()
-        .map(|item| vec![serde_json::value::to_raw_value(item).unwrap()])
-        .collect();
-    let reqs: Vec<_> = args
+        .map(|item| jsonrpc::try_arg([item]).context("failed to serialize into JSON"))
+        .collect::<Result<Vec<_>>>()?;
+    let reqs: Vec<jsonrpc::Request> = args
         .iter()
-        .map(|arg| client.build_request(name, arg))
+        .map(|arg| client.build_request(name, Some(arg)))
         .collect();
     match client.send_batch(&reqs) {
         Ok(values) => {
diff --git a/src/index.rs b/src/index.rs
index f14b1f2..e4d2a6a 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -263,7 +263,7 @@ fn index_single_block(
         fn visit_tx_out(&mut self, _vout: usize, tx_out: &bsl::TxOut) -> ControlFlow<()> {
             let script = bitcoin::Script::from_bytes(tx_out.script_pubkey());
             // skip indexing unspendable outputs
-            if !script.is_provably_unspendable() {
+            if !script.is_op_return() {
                 let row = ScriptHashRow::row(ScriptHash::new(script), self.height);
                 self.batch.funding_rows.push(row.to_db_row());
             }
diff --git a/src/p2p.rs b/src/p2p.rs
index 0726e3b..3922f27 100644
--- a/src/p2p.rs
+++ b/src/p2p.rs
@@ -7,6 +7,7 @@ use bitcoin::{
         Decodable,
     },
     hashes::Hash,
+    io,
     p2p::{
         self, address,
         message::{self, CommandString, NetworkMessage},
@@ -19,9 +20,8 @@ use bitcoin::{
 use bitcoin_slices::{bsl, Parse};
 use crossbeam_channel::{bounded, select, Receiver, Sender};
 
-use std::io::{self, ErrorKind, Write};
+use std::io::Write;
 use std::net::{IpAddr, Ipv4Addr, SocketAddr, TcpStream};
-use std::sync::Arc;
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 
 use crate::types::SerBlock;
@@ -141,10 +141,11 @@ impl Connection {
         metrics: &Metrics,
         magic: Magic,
     ) -> Result<Self> {
-        let conn = Arc::new(
-            TcpStream::connect(address)
-                .with_context(|| format!("{} p2p failed to connect: {:?}", network, address))?,
-        );
+        let recv_conn = TcpStream::connect(address)
+            .with_context(|| format!("{} p2p failed to connect: {:?}", network, address))?;
+        let mut send_conn = recv_conn
+            .try_clone()
+            .context("failed to clone connection")?;
 
         let (tx_send, tx_recv) = bounded::<NetworkMessage>(1);
         let (rx_send, rx_recv) = bounded::<RawNetworkMessage>(1);
@@ -180,7 +181,6 @@ impl Connection {
             default_duration_buckets(),
         );
 
-        let stream = Arc::clone(&conn);
         let mut buffer = vec![];
         crate::thread::spawn("p2p_send", move || loop {
             use std::net::Shutdown;
@@ -190,7 +190,7 @@ impl Connection {
                     // p2p_loop is closed, so tx_send is disconnected
                     debug!("closing p2p_send thread: no more messages to send");
                     // close the stream reader (p2p_recv thread may block on it)
-                    if let Err(e) = stream.shutdown(Shutdown::Read) {
+                    if let Err(e) = send_conn.shutdown(Shutdown::Read) {
                         warn!("failed to shutdown p2p connection: {}", e)
                     }
                     return Ok(());
@@ -203,16 +203,16 @@ impl Connection {
                 raw_msg
                     .consensus_encode(&mut buffer)
                     .expect("in-memory writers don't error");
-                (&*stream)
+                send_conn
                     .write_all(buffer.as_slice())
                     .context("p2p failed to send")
             })?;
         });
 
-        let stream = Arc::clone(&conn);
+        let mut stream_reader = std::io::BufReader::new(recv_conn);
         crate::thread::spawn("p2p_recv", move || loop {
             let start = Instant::now();
-            let raw_msg = RawNetworkMessage::consensus_decode(&mut &*stream);
+            let raw_msg = RawNetworkMessage::consensus_decode(&mut stream_reader);
             {
                 let duration = duration_to_seconds(start.elapsed());
                 let label = format!(
@@ -232,7 +232,7 @@ impl Connection {
                     }
                     raw_msg
                 }
-                Err(encode::Error::Io(e)) if e.kind() == ErrorKind::UnexpectedEof => {
+                Err(encode::Error::Io(e)) if e.kind() == io::ErrorKind::UnexpectedEof => {
                     debug!("closing p2p_recv thread: connection closed");
                     return Ok(());
                 }
@@ -390,7 +390,9 @@ enum ParsedNetworkMessage {
 }
 
 impl Decodable for RawNetworkMessage {
-    fn consensus_decode<D: io::Read + ?Sized>(d: &mut D) -> Result<Self, encode::Error> {
+    fn consensus_decode<D: bitcoin::io::BufRead + ?Sized>(
+        d: &mut D,
+    ) -> Result<Self, encode::Error> {
         let magic = Decodable::consensus_decode(d)?;
         let cmd = Decodable::consensus_decode(d)?;
 
diff --git a/src/types.rs b/src/types.rs
index 599685e..ca7f7b3 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -6,7 +6,7 @@ use bitcoin::blockdata::block::Header as BlockHeader;
 use bitcoin::{
     consensus::encode::{deserialize, Decodable, Encodable},
     hashes::{hash_newtype, sha256, Hash},
-    OutPoint, Script, Txid,
+    io, OutPoint, Script, Txid,
 };
 use bitcoin_slices::bsl;
 
@@ -16,10 +16,10 @@ macro_rules! impl_consensus_encoding {
     ($thing:ident, $($field:ident),+) => (
         impl Encodable for $thing {
             #[inline]
-            fn consensus_encode<S: ::std::io::Write + ?Sized>(
+            fn consensus_encode<S: io::Write + ?Sized>(
                 &self,
                 s: &mut S,
-            ) -> Result<usize, std::io::Error> {
+            ) -> Result<usize, io::Error> {
                 let mut len = 0;
                 $(len += self.$field.consensus_encode(s)?;)+
                 Ok(len)
@@ -28,7 +28,7 @@ macro_rules! impl_consensus_encoding {
 
         impl Decodable for $thing {
             #[inline]
-            fn consensus_decode<D: ::std::io::Read + ?Sized>(
+            fn consensus_decode<D: io::BufRead + ?Sized>(
                 d: &mut D,
             ) -> Result<$thing, bitcoin::consensus::encode::Error> {
                 Ok($thing {