diff --git a/Cargo.lock b/Cargo.lock
index 1dfb25c..c1ad3c9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -122,6 +122,62 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
 
+[[package]]
+name = "crossbeam"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1137cd7e7fc0fb5d3c5a8678be38ec56e819125d8d7907411fe24ccb943faca8"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-epoch",
+ "crossbeam-queue",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-queue"
+version = "0.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f58bbc28f91df819d0aa2a2c00cd19754769c2fad90579b3592b1c9ba7a3115"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
+
 [[package]]
 name = "goblin"
 version = "0.10.4"
@@ -281,6 +337,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "clap",
+ "crossbeam",
  "goblin",
  "int-enum",
  "memmap2",
diff --git a/Cargo.toml b/Cargo.toml
index 35ad73b..42f4eea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2024"
 [dependencies]
 anyhow = "1.0.100"
 clap = { version = "4.5.53", features = ["derive"] }
+crossbeam = { version = "0.8.4", features = ["crossbeam-channel"] }
 goblin = "0.10.4"
 int-enum = "1.2.0"
 memmap2 = "0.9.8"
diff --git a/src/core.rs b/src/core.rs
index 30d879a..4a05aa8 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -1,10 +1,10 @@
-// Copyright (c) 2025 taitep
+// Copyright (c) 2025-2026 taitep
 // SPDX-License-Identifier: BSD-2-Clause
 //
 // This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
 // See LICENSE file in the project root for full license text.
 
-use std::{collections::HashSet, sync::mpsc};
+use std::collections::HashSet;
 
 use crate::{
     core::commands::CoreCmd,
@@ -19,13 +19,13 @@ pub struct Core {
     pub(crate) x_regs: [u64; 32],
     pub(crate) pc: u64,
     pub(crate) mem: MemConfig,
-    command_stream: mpsc::Receiver<CoreCmd>,
+    command_stream: crossbeam::channel::Receiver<CoreCmd>,
 }
 
 pub mod commands;
 
 impl Core {
-    pub fn new(mem: MemConfig, command_stream: mpsc::Receiver<CoreCmd>) -> Self {
+    pub fn new(mem: MemConfig, command_stream: crossbeam::channel::Receiver<CoreCmd>) -> Self {
         Self {
             x_regs: [0; 32],
             pc: 0,
@@ -103,7 +103,10 @@ impl Core {
         };
     }
 
-    fn debug_loop(&mut self, dbg_stream: mpsc::Receiver<gdb::DebugCommand>) -> anyhow::Result<()> {
+    fn debug_loop(
+        &mut self,
+        dbg_stream: crossbeam::channel::Receiver<gdb::DebugCommand>,
+    ) -> anyhow::Result<()> {
         let mut breakpoints = HashSet::new();
 
         loop {
diff --git a/src/gdb.rs b/src/gdb.rs
index d781a6a..7c1fcd8 100644
--- a/src/gdb.rs
+++ b/src/gdb.rs
@@ -1,4 +1,4 @@
-// Copyright (c) 2025 taitep
+// Copyright (c) 2025-2026 taitep
 // SPDX-License-Identifier: BSD-2-Clause
 //
 // This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
@@ -7,7 +7,6 @@
 use std::{
     io::{self, BufRead, ErrorKind, Write},
     net::{TcpListener, TcpStream},
-    sync::mpsc,
 };
 
 use crate::{
@@ -29,7 +28,7 @@ pub(crate) enum DebugCommand {
     ExitDebugMode,
 }
 
-pub struct DebugStream(pub(crate) mpsc::Receiver<DebugCommand>);
+pub struct DebugStream(pub(crate) crossbeam::channel::Receiver<DebugCommand>);
 
 #[derive(Clone, Copy, Debug)]
 pub(crate) enum StopReason {
@@ -68,13 +67,13 @@ pub(crate) struct RegsResponse {
     pub pc: u64,
 }
 
-pub fn run_stub(cmd_sender: mpsc::Sender<CoreCmd>) {
+pub fn run_stub(cmd_sender: crossbeam::channel::Sender<CoreCmd>) {
     std::thread::spawn(move || {
         let listener = TcpListener::bind("127.0.0.1:1234").expect("couldnt start tcp listener");
 
         for stream_res in listener.incoming() {
             if let Ok(stream) = stream_res {
-                let (dbg_tx, dbg_rx) = mpsc::channel();
+                let (dbg_tx, dbg_rx) = crossbeam::channel::bounded(16);
 
                 stream
                     .set_nonblocking(true)
@@ -92,7 +91,7 @@ pub fn run_stub(cmd_sender: mpsc::Sender<CoreCmd>) {
 
 fn handle_gdb_connection(
     gdb_stream: TcpStream,
-    dbg_tx: mpsc::Sender<DebugCommand>,
+    dbg_tx: crossbeam::channel::Sender<DebugCommand>,
 ) -> io::Result<()> {
     eprintln!("gdb connected");
     let mut reader = io::BufReader::new(gdb_stream.try_clone()?);
@@ -152,7 +151,7 @@ fn read_rsp_packet<R: BufRead>(reader: &mut R) -> io::Result<String> {
 fn handle_packet<W: Write, R: BufRead>(
     packet: &str,
     writer: &mut W,
-    dbg_tx: &mpsc::Sender<DebugCommand>,
+    dbg_tx: &crossbeam::channel::Sender<DebugCommand>,
     reader: &mut R,
 ) -> io::Result<()> {
     writer.write_all(b"+")?;
diff --git a/src/main.rs b/src/main.rs
index 4e02745..a9b8672 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,4 @@
-// Copyright (c) 2025 taitep
+// Copyright (c) 2025-2026 taitep
 // SPDX-License-Identifier: BSD-2-Clause
 //
 // This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
@@ -48,7 +48,7 @@ fn main() -> Result<()> {
         mmio_root,
     };
 
-    let (cmd_sender, cmd_reciever) = std::sync::mpsc::channel();
+    let (cmd_sender, cmd_reciever) = crossbeam::channel::bounded(16);
 
     gdb::run_stub(cmd_sender.clone());