diff --git a/Cargo.lock b/Cargo.lock
index 8e962d3523..7f3723f2e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -176,6 +176,17 @@ dependencies = [
  "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-utils 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.2.0"
@@ -355,7 +366,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "gen_lsp_server"
 version = "0.1.0"
 dependencies = [
- "crossbeam-channel 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-channel 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "languageserver-types 0.53.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1544,6 +1555,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 "checksum crossbeam-channel 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7b85741761b7f160bc5e7e0c14986ef685b7f8bf9b7ad081c60c604bb4649827"
+"checksum crossbeam-channel 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "137bc235f622ffaa0428e3854e24acb53291fc0b3ff6fb2cb75a8be6fb02f06b"
 "checksum crossbeam-deque 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f739f8c5363aca78cfb059edf753d8f0d36908c348f3d8d1503f03d8b75d9cf3"
 "checksum crossbeam-epoch 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "927121f5407de9956180ff5e936fe3cf4324279280001cd56b669d28ee7e9150"
 "checksum crossbeam-epoch 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2449aaa4ec7ef96e5fb24db16024b935df718e9ae1cec0a1e68feeca2efca7b8"
diff --git a/crates/gen_lsp_server/Cargo.toml b/crates/gen_lsp_server/Cargo.toml
index afeeb15133..2aee4ea166 100644
--- a/crates/gen_lsp_server/Cargo.toml
+++ b/crates/gen_lsp_server/Cargo.toml
@@ -13,4 +13,4 @@ log = "0.4.3"
 failure = "0.1.2"
 serde_json = "1.0.24"
 serde = { version = "1.0.83", features = ["derive"] }
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.3.5"
diff --git a/crates/gen_lsp_server/src/lib.rs b/crates/gen_lsp_server/src/lib.rs
index 8779fbf0fd..b206529285 100644
--- a/crates/gen_lsp_server/src/lib.rs
+++ b/crates/gen_lsp_server/src/lib.rs
@@ -95,7 +95,7 @@ pub fn run_server(
     server(params, &receiver, &sender)?;
     log::info!("lsp server waiting for exit notification");
     match receiver.recv() {
-        Some(RawMessage::Notification(n)) => n
+        Ok(RawMessage::Notification(n)) => n
             .cast::<Exit>()
             .map_err(|n| format_err!("unexpected notification during shutdown: {:?}", n))?,
         m => bail!("unexpected message during shutdown: {:?}", m),
@@ -109,7 +109,7 @@ pub fn handle_shutdown(req: RawRequest, sender: &Sender<RawMessage>) -> Option<R
     match req.cast::<Shutdown>() {
         Ok((id, ())) => {
             let resp = RawResponse::ok::<Shutdown>(id, &());
-            sender.send(RawMessage::Response(resp));
+            let _ = sender.send(RawMessage::Response(resp));
             None
         }
         Err(req) => Some(req),
@@ -122,16 +122,16 @@ fn initialize(
     caps: ServerCapabilities,
 ) -> Result<InitializeParams> {
     let (id, params) = match receiver.recv() {
-        Some(RawMessage::Request(req)) => match req.cast::<Initialize>() {
+        Ok(RawMessage::Request(req)) => match req.cast::<Initialize>() {
             Err(req) => bail!("expected initialize request, got {:?}", req),
             Ok(req) => req,
         },
         msg => bail!("expected initialize request, got {:?}", msg),
     };
     let resp = RawResponse::ok::<Initialize>(id, &InitializeResult { capabilities: caps });
-    sender.send(RawMessage::Response(resp));
+    sender.send(RawMessage::Response(resp)).unwrap();
     match receiver.recv() {
-        Some(RawMessage::Notification(n)) => {
+        Ok(RawMessage::Notification(n)) => {
             n.cast::<Initialized>()
                 .map_err(|_| format_err!("expected initialized notification"))?;
         }
diff --git a/crates/gen_lsp_server/src/stdio.rs b/crates/gen_lsp_server/src/stdio.rs
index 35d8e46d00..5c8e338547 100644
--- a/crates/gen_lsp_server/src/stdio.rs
+++ b/crates/gen_lsp_server/src/stdio.rs
@@ -9,11 +9,13 @@ use failure::bail;
 use crate::{RawMessage, Result};
 
 pub fn stdio_transport() -> (Receiver<RawMessage>, Sender<RawMessage>, Threads) {
-    let (writer_sender, mut writer_receiver) = bounded::<RawMessage>(16);
+    let (writer_sender, writer_receiver) = bounded::<RawMessage>(16);
     let writer = thread::spawn(move || {
         let stdout = stdout();
         let mut stdout = stdout.lock();
-        writer_receiver.try_for_each(|it| it.write(&mut stdout))?;
+        writer_receiver
+            .into_iter()
+            .try_for_each(|it| it.write(&mut stdout))?;
         Ok(())
     });
     let (reader_sender, reader_receiver) = bounded::<RawMessage>(16);
@@ -21,7 +23,9 @@ pub fn stdio_transport() -> (Receiver<RawMessage>, Sender<RawMessage>, Threads)
         let stdin = stdin();
         let mut stdin = stdin.lock();
         while let Some(msg) = RawMessage::read(&mut stdin)? {
-            reader_sender.send(msg);
+            if let Err(_) = reader_sender.send(msg) {
+                break;
+            }
         }
         Ok(())
     });