diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 29903b801..997fc3aec 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -4200,9 +4200,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-tungstenite"
-version = "0.24.0"
+version = "0.26.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edc5f74e248dc973e0dbb7b74c7e0d6fcc301c694ff50049504004ef4d0cdcd9"
+checksum = "7a9daff607c6d2bf6c16fd681ccb7eecc83e4e2cdc1ca067ffaadfca5de7f084"
 dependencies = [
  "futures-util",
  "log",
@@ -4456,21 +4456,20 @@ dependencies = [
 
 [[package]]
 name = "tungstenite"
-version = "0.24.0"
+version = "0.26.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18e5b8366ee7a95b16d32197d0b2604b43a0be89dc5fac9f8e96ccafbaedda8a"
+checksum = "4793cb5e56680ecbb1d843515b23b6de9a75eb04b66643e256a396d43be33c13"
 dependencies = [
- "byteorder",
  "bytes",
  "data-encoding",
  "http 1.3.1",
  "httparse",
  "log",
- "rand 0.8.5",
+ "rand 0.9.0",
  "rustls",
  "rustls-pki-types",
  "sha1",
- "thiserror 1.0.69",
+ "thiserror 2.0.12",
  "utf-8",
 ]
 
diff --git a/rust/kcl-lib/Cargo.toml b/rust/kcl-lib/Cargo.toml
index d3463bcb4..6bd2a19e1 100644
--- a/rust/kcl-lib/Cargo.toml
+++ b/rust/kcl-lib/Cargo.toml
@@ -107,7 +107,7 @@ web-sys = { version = "0.3.76", features = ["console"] }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 instant = "0.1.13"
 tokio = { workspace = true, features = ["full"] }
-tokio-tungstenite = { version = "0.24.0", features = [
+tokio-tungstenite = { version = "0.26.2", features = [
     "rustls-tls-native-roots",
 ] }
 tower-lsp = { workspace = true, features = ["proposed", "default"] }
diff --git a/rust/kcl-lib/src/engine/conn.rs b/rust/kcl-lib/src/engine/conn.rs
index 7ffbf9826..36c8e1339 100644
--- a/rust/kcl-lib/src/engine/conn.rs
+++ b/rust/kcl-lib/src/engine/conn.rs
@@ -206,7 +206,7 @@ impl EngineConnection {
     async fn inner_send_to_engine(request: WebSocketRequest, tcp_write: &mut WebSocketTcpWrite) -> Result<()> {
         let msg = serde_json::to_string(&request).map_err(|e| anyhow!("could not serialize json: {e}"))?;
         tcp_write
-            .send(WsMsg::Text(msg))
+            .send(WsMsg::Text(msg.into()))
             .await
             .map_err(|e| anyhow!("could not send json over websocket: {e}"))?;
         Ok(())
@@ -216,19 +216,17 @@ impl EngineConnection {
     async fn inner_send_to_engine_binary(request: WebSocketRequest, tcp_write: &mut WebSocketTcpWrite) -> Result<()> {
         let msg = bson::to_vec(&request).map_err(|e| anyhow!("could not serialize bson: {e}"))?;
         tcp_write
-            .send(WsMsg::Binary(msg))
+            .send(WsMsg::Binary(msg.into()))
             .await
             .map_err(|e| anyhow!("could not send json over websocket: {e}"))?;
         Ok(())
     }
 
     pub async fn new(ws: reqwest::Upgraded) -> Result<EngineConnection> {
-        let wsconfig = tokio_tungstenite::tungstenite::protocol::WebSocketConfig {
+        let wsconfig = tokio_tungstenite::tungstenite::protocol::WebSocketConfig::default()
             // 4294967296 bytes, which is around 4.2 GB.
-            max_message_size: Some(usize::MAX),
-            max_frame_size: Some(usize::MAX),
-            ..Default::default()
-        };
+            .max_message_size(Some(usize::MAX))
+            .max_frame_size(Some(usize::MAX));
 
         let ws_stream = tokio_tungstenite::WebSocketStream::from_raw_socket(
             ws,