diff --git a/crates/dht/src/dht.rs b/crates/dht/src/dht.rs
index 6d90908..fb8308c 100644
--- a/crates/dht/src/dht.rs
+++ b/crates/dht/src/dht.rs
@@ -179,6 +179,7 @@ impl DhtState {
             MessageKind::Response(r) => r,
             _ => unreachable!(),
         };
+        self.routing_table.mark_response(&response.id);
         match outstanding.request {
             Request::FindNode(id) => {
                 let nodes = response
@@ -243,9 +244,6 @@ impl DhtState {
                     }
                 }
             }
-            InsertResult::WasExisting => {
-                self.routing_table.mark_response(&source);
-            }
             _ => {}
         };
         for node in nodes.nodes {
@@ -276,6 +274,8 @@ impl DhtState {
         data: bprotocol::Response<ByteString>,
     ) -> anyhow::Result<()> {
         self.routing_table.add_node(source, source_addr);
+        self.routing_table.mark_response(&source);
+
         if let Some(peers) = data.values {
             let subscribers = match self.subscribers.get(&target) {
                 Some(subscribers) => subscribers,
diff --git a/crates/librqbit/src/dht_utils.rs b/crates/librqbit/src/dht_utils.rs
index 27ced68..ce74841 100644
--- a/crates/librqbit/src/dht_utils.rs
+++ b/crates/librqbit/src/dht_utils.rs
@@ -1,5 +1,6 @@
 use std::{collections::HashSet, net::SocketAddr};
 
+use anyhow::Context;
 use buffers::ByteString;
 use futures::{stream::FuturesUnordered, StreamExt};
 use librqbit_core::torrent_metainfo::TorrentMetaV1Info;
@@ -32,10 +33,22 @@ pub async fn read_metainfo_from_peer_receiver<A: StreamExt<Item = SocketAddr> +
     };
     seen.insert(first_addr);
 
+    let semaphore = tokio::sync::Semaphore::new(128);
+
+    let read_info_guarded = |addr| {
+        let semaphore = &semaphore;
+        async move {
+            let token = semaphore.acquire().await?;
+            let ret = peer_info_reader::read_metainfo_from_peer(addr, peer_id, info_hash)
+                .await
+                .with_context(|| format!("error reading metainfo from {}", addr));
+            drop(token);
+            ret
+        }
+    };
+
     let mut unordered = FuturesUnordered::new();
-    unordered.push(peer_info_reader::read_metainfo_from_peer(
-        first_addr, peer_id, info_hash,
-    ));
+    unordered.push(read_info_guarded(first_addr));
 
     loop {
         tokio::select! {
@@ -43,7 +56,7 @@ pub async fn read_metainfo_from_peer_receiver<A: StreamExt<Item = SocketAddr> +
                 match next_addr {
                     Some(addr) => {
                         if seen.insert(addr) {
-                            unordered.push(peer_info_reader::read_metainfo_from_peer(addr, peer_id, info_hash));
+                            unordered.push(read_info_guarded(addr));
                         }
                     },
                     None => return ReadMetainfoResult::ChannelClosed { seen },
@@ -53,7 +66,7 @@ pub async fn read_metainfo_from_peer_receiver<A: StreamExt<Item = SocketAddr> +
                 match done {
                     Some(Ok(info)) => return ReadMetainfoResult::Found { info, seen, rx: addrs },
                     Some(Err(e)) => {
-                        debug!("error in peer_info_reader::read_metainfo_from_peer: {}", e);
+                        debug!("{:#}", e);
                     },
                     None => unreachable!()
                 }
@@ -85,8 +98,8 @@ mod tests {
         let peer_rx = dht.get_peers(info_hash).await;
         let peer_id = generate_peer_id();
         match read_metainfo_from_peer_receiver(peer_id, info_hash, peer_rx).await {
-            ReadMetainfoResult::Found { info, rx, seen } => dbg!(info),
-            ReadMetainfoResult::ChannelClosed { seen } => todo!("should not have happened"),
+            ReadMetainfoResult::Found { info, .. } => dbg!(info),
+            ReadMetainfoResult::ChannelClosed { .. } => todo!("should not have happened"),
         };
     }
 }
diff --git a/crates/librqbit/src/peer_connection.rs b/crates/librqbit/src/peer_connection.rs
index 8236016..6f1fcfe 100644
--- a/crates/librqbit/src/peer_connection.rs
+++ b/crates/librqbit/src/peer_connection.rs
@@ -143,9 +143,9 @@ impl<H: PeerConnectionHandler> PeerConnection<H> {
         debug!(
             "connected peer {}: {:?}",
             self.addr,
-            try_decode_peer_id(h.peer_id)
+            try_decode_peer_id(Id20(h.peer_id))
         );
-        if h.info_hash != self.info_hash {
+        if h.info_hash != self.info_hash.0 {
             anyhow::bail!("info hash does not match");
         }
 
diff --git a/crates/librqbit/src/torrent_state.rs b/crates/librqbit/src/torrent_state.rs
index 8432195..04d75f4 100644
--- a/crates/librqbit/src/torrent_state.rs
+++ b/crates/librqbit/src/torrent_state.rs
@@ -422,7 +422,7 @@ impl TorrentState {
         let mut g = self.locked.write();
         match g.peers.states.get_mut(&handle) {
             Some(s @ &mut PeerState::Connecting) => {
-                *s = PeerState::Live(LivePeerState::new(h.peer_id));
+                *s = PeerState::Live(LivePeerState::new(Id20(h.peer_id)));
             }
             _ => {
                 warn!("peer {} was in wrong state", handle);
diff --git a/crates/peer_binary_protocol/src/extended/handshake.rs b/crates/peer_binary_protocol/src/extended/handshake.rs
index 5e9ef09..db41803 100644
--- a/crates/peer_binary_protocol/src/extended/handshake.rs
+++ b/crates/peer_binary_protocol/src/extended/handshake.rs
@@ -30,7 +30,7 @@ pub struct ExtendedHandshake<ByteBuf: Eq + std::hash::Hash> {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub metadata_size: Option<u32>,
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub complete_ago: Option<u32>,
+    pub complete_ago: Option<i32>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub upload_only: Option<u32>,
 }
diff --git a/crates/peer_binary_protocol/src/lib.rs b/crates/peer_binary_protocol/src/lib.rs
index 675c497..514a4da 100644
--- a/crates/peer_binary_protocol/src/lib.rs
+++ b/crates/peer_binary_protocol/src/lib.rs
@@ -474,8 +474,8 @@ where
 pub struct Handshake<'a> {
     pub pstr: &'a str,
     pub reserved: [u8; 8],
-    pub info_hash: Id20,
-    pub peer_id: Id20,
+    pub info_hash: [u8; 20],
+    pub peer_id: [u8; 20],
 }
 
 fn bopts() -> impl bincode::Options {
@@ -497,8 +497,8 @@ impl<'a> Handshake<'a> {
         Handshake {
             pstr: PSTR_BT1,
             reserved: reserved_arr,
-            info_hash,
-            peer_id,
+            info_hash: info_hash.0,
+            peer_id: peer_id.0,
         }
     }
     pub fn supports_extended(&self) -> bool {