diff --git a/Dockerfile-collab b/Dockerfile-collab
index 50af874200a6ef3bc3c882b7d08257ec41f944de..fbbcb0df0484c26a65823171cc976de8cb838b8c 100644
--- a/Dockerfile-collab
+++ b/Dockerfile-collab
@@ -1,6 +1,6 @@
 # syntax = docker/dockerfile:1.2
 
-FROM rust:1.93-bookworm as builder
+FROM rust:1.94-bookworm as builder
 WORKDIR app
 COPY . .
 
diff --git a/crates/dap/src/client.rs b/crates/dap/src/client.rs
index aa2e53f43cb13511e7eee2e9685a4939b07243b9..966445e4480c12a11bb7e331d14a32bb9118096a 100644
--- a/crates/dap/src/client.rs
+++ b/crates/dap/src/client.rs
@@ -284,6 +284,7 @@ mod tests {
 
     #[gpui::test]
     pub async fn test_initialize_client(cx: &mut TestAppContext) {
+        #![expect(clippy::result_large_err)]
         init_test(cx);
 
         let client = DebugAdapterClient::start(
diff --git a/crates/debugger_ui/src/tests/attach_modal.rs b/crates/debugger_ui/src/tests/attach_modal.rs
index 4e8839f82f4de69fd1851ef50ff0d55ad09d0aa9..0b89b8c133956791892ea1f1959d06a20df8d005 100644
--- a/crates/debugger_ui/src/tests/attach_modal.rs
+++ b/crates/debugger_ui/src/tests/attach_modal.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     attach_modal::{Candidate, ModalIntent},
     tests::start_debug_session_with,
diff --git a/crates/debugger_ui/src/tests/console.rs b/crates/debugger_ui/src/tests/console.rs
index fad483b0f4af19826f9da0d32659c8ac83712f1f..9e672be080aad417ca299a16c8de126617a3bce6 100644
--- a/crates/debugger_ui/src/tests/console.rs
+++ b/crates/debugger_ui/src/tests/console.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     tests::{active_debug_session_panel, start_debug_session},
     *,
diff --git a/crates/debugger_ui/src/tests/dap_logger.rs b/crates/debugger_ui/src/tests/dap_logger.rs
index ff2b0f695f6a2e7f0ca65b49938e0129efb04326..3b40e27aa43e3ec251b12b020b1d9bced829875e 100644
--- a/crates/debugger_ui/src/tests/dap_logger.rs
+++ b/crates/debugger_ui/src/tests/dap_logger.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::tests::{init_test, init_test_workspace, start_debug_session};
 use dap::requests::{StackTrace, Threads};
 use debugger_tools::LogStore;
diff --git a/crates/debugger_ui/src/tests/debugger_panel.rs b/crates/debugger_ui/src/tests/debugger_panel.rs
index e4c258a8d2af0b865f13c28430c44a66117a11cd..223ed13142d91584eb1ec309e33e2442a3601782 100644
--- a/crates/debugger_ui/src/tests/debugger_panel.rs
+++ b/crates/debugger_ui/src/tests/debugger_panel.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     persistence::DebuggerPaneItem,
     tests::{start_debug_session, start_debug_session_with},
diff --git a/crates/debugger_ui/src/tests/inline_values.rs b/crates/debugger_ui/src/tests/inline_values.rs
index 3ca29f7cc3e99514d8a664d9218593c3640b27dc..c82276d824349c5d5e588cbde68ee3ae9bc5370f 100644
--- a/crates/debugger_ui/src/tests/inline_values.rs
+++ b/crates/debugger_ui/src/tests/inline_values.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::{path::Path, sync::Arc};
 
 use dap::{Scope, StackFrame, Variable, requests::Variables};
diff --git a/crates/debugger_ui/src/tests/module_list.rs b/crates/debugger_ui/src/tests/module_list.rs
index 09c90cbc4a3af71aa9fb7273cf3535e9f7ece592..21b5ec67c20b5fda509df501e206919d0e83be08 100644
--- a/crates/debugger_ui/src/tests/module_list.rs
+++ b/crates/debugger_ui/src/tests/module_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     debugger_panel::DebugPanel,
     persistence::DebuggerPaneItem,
diff --git a/crates/debugger_ui/src/tests/new_process_modal.rs b/crates/debugger_ui/src/tests/new_process_modal.rs
index 54c38d8b1cec8d043748338830d643d63479e533..01e83b533eb21e178bfaacaf9184757fcb207738 100644
--- a/crates/debugger_ui/src/tests/new_process_modal.rs
+++ b/crates/debugger_ui/src/tests/new_process_modal.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use dap::DapRegistry;
 use editor::Editor;
 use gpui::{BackgroundExecutor, TestAppContext, VisualTestContext};
diff --git a/crates/debugger_ui/src/tests/persistence.rs b/crates/debugger_ui/src/tests/persistence.rs
index f5fb4f0ab2d5957240c6981d20526a025f54a387..ca04828c40b3b33467b6fed8f623d9e6919aeb65 100644
--- a/crates/debugger_ui/src/tests/persistence.rs
+++ b/crates/debugger_ui/src/tests/persistence.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::iter::zip;
 
 use crate::{
diff --git a/crates/debugger_ui/src/tests/stack_frame_list.rs b/crates/debugger_ui/src/tests/stack_frame_list.rs
index 7e1763f6650127be12803f4d64bc16f0ab3c9989..dd1ddcdf7a160e051a18993983da59a50dba71fd 100644
--- a/crates/debugger_ui/src/tests/stack_frame_list.rs
+++ b/crates/debugger_ui/src/tests/stack_frame_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use crate::{
     debugger_panel::DebugPanel,
     session::running::stack_frame_list::{
diff --git a/crates/debugger_ui/src/tests/variable_list.rs b/crates/debugger_ui/src/tests/variable_list.rs
index 4cfdae093f6a1464b178c053e629a6ebe6d76d02..8e6c1259921b45fe6c63099fae04d284c3c134fc 100644
--- a/crates/debugger_ui/src/tests/variable_list.rs
+++ b/crates/debugger_ui/src/tests/variable_list.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::sync::{
     Arc,
     atomic::{AtomicBool, Ordering},
diff --git a/crates/eval_cli/Dockerfile b/crates/eval_cli/Dockerfile
index f733ca42cbe5b37f25f25f510eee3fc57e102495..c0ce40f6032a23b6de995bf00393e68f01111616 100644
--- a/crates/eval_cli/Dockerfile
+++ b/crates/eval_cli/Dockerfile
@@ -7,12 +7,12 @@
 # Or use the helper script:
 #   crates/eval_cli/script/build-linux
 
-FROM rust:1.93 AS builder
+FROM rust:1.94.1 AS builder
 
 WORKDIR /app
 
     # Pre-install the toolchain specified in rust-toolchain.toml so it is cached.
-RUN rustup toolchain install 1.93 --profile minimal \
+RUN rustup toolchain install 1.94.1 --profile minimal \
     --component rustfmt --component clippy --component rust-analyzer --component rust-src \
     --target wasm32-wasip2 --target wasm32-unknown-unknown --target x86_64-unknown-linux-musl --target x86_64-unknown-linux-gnu
 
diff --git a/crates/project/src/debugger/test.rs b/crates/project/src/debugger/test.rs
index 53b88323e6326fe7d6d74f79a5e92845514c6b61..7ccbafa0e5507e3b7362a31df5170e285d7532f0 100644
--- a/crates/project/src/debugger/test.rs
+++ b/crates/project/src/debugger/test.rs
@@ -1,3 +1,4 @@
+#![expect(clippy::result_large_err)]
 use std::{path::Path, sync::Arc};
 
 use dap::client::DebugAdapterClient;
diff --git a/crates/rpc/src/message_stream.rs b/crates/rpc/src/message_stream.rs
index 023e916df3113e73adafdc0d38948121ad2e9cec..34888d98147124c5c971843d0124fceb95e47cde 100644
--- a/crates/rpc/src/message_stream.rs
+++ b/crates/rpc/src/message_stream.rs
@@ -7,7 +7,6 @@ use futures::{SinkExt as _, StreamExt as _};
 use proto::Message as _;
 use std::time::Instant;
 use std::{fmt::Debug, io};
-use zstd::zstd_safe::WriteBuf;
 
 const KIB: usize = 1024;
 const MIB: usize = KIB * 1024;
@@ -87,7 +86,10 @@ where
             let received_at = Instant::now();
             match bytes? {
                 WebSocketMessage::Binary(bytes) => {
-                    zstd::stream::copy_decode(bytes.as_slice(), &mut self.encoding_buffer)?;
+                    zstd::stream::copy_decode(
+                        zstd::zstd_safe::WriteBuf::as_slice(&*bytes),
+                        &mut self.encoding_buffer,
+                    )?;
                     let envelope = Envelope::decode(self.encoding_buffer.as_slice())
                         .map_err(io::Error::from)?;
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 89b3c648ca2a8a9b893d1b0924697f8170047761..15b4a8f0fc9f93064f08046bcb1edff01e6c6d44 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,5 +1,5 @@
 [toolchain]
-channel = "1.93"
+channel = "1.94.1"
 profile = "minimal"
 components = [ "rustfmt", "clippy", "rust-analyzer", "rust-src" ]
 targets = [