diff --git a/Cargo.lock b/Cargo.lock
index a046802..3ad9529 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1076,6 +1076,7 @@ dependencies = [
  "chat",
  "common",
  "flume 0.11.1",
+ "futures",
  "gpui",
  "itertools 0.13.0",
  "linkify",
@@ -1086,7 +1087,6 @@ dependencies = [
  "serde",
  "settings",
  "smallvec",
- "smol",
  "state",
  "theme",
  "ui",
diff --git a/crates/chat_ui/Cargo.toml b/crates/chat_ui/Cargo.toml
index 0cc8ed3..fd2c1f1 100644
--- a/crates/chat_ui/Cargo.toml
+++ b/crates/chat_ui/Cargo.toml
@@ -19,11 +19,10 @@ anyhow.workspace = true
 itertools.workspace = true
 smallvec.workspace = true
 flume.workspace = true
+futures.workspace = true
 log.workspace = true
 serde.workspace = true
 
 linkify = "0.10.0"
 pulldown-cmark = "0.13.1"
 
-[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-smol.workspace = true
diff --git a/crates/chat_ui/src/lib.rs b/crates/chat_ui/src/lib.rs
index a00434f..9d3a002 100644
--- a/crates/chat_ui/src/lib.rs
+++ b/crates/chat_ui/src/lib.rs
@@ -1,12 +1,11 @@
 use std::collections::{BTreeMap, BTreeSet, HashSet};
-#[cfg(target_arch = "wasm32")]
-use std::sync::RwLock as AsyncRwLock;
 use std::sync::{Arc, RwLock};
 
 pub use actions::*;
 use anyhow::{Context as AnyhowContext, Error};
 use chat::{ChatRegistry, Message, Room, RoomEvent, SendReport, SendStatus};
 use common::{TimestampExt, coop_cache};
+use futures::lock::Mutex;
 use gpui::prelude::FluentBuilder;
 use gpui::{
     AnyElement, App, AppContext, ClipboardItem, Context, Entity, EventEmitter, FocusHandle,
@@ -20,8 +19,6 @@ use nostr_sdk::prelude::*;
 use person::{Person, PersonRegistry};
 use settings::{AppSettings, SignerKind};
 use smallvec::{SmallVec, smallvec};
-#[cfg(not(target_arch = "wasm32"))]
-use smol::lock::RwLock as AsyncRwLock;
 use state::{NostrRegistry, upload};
 use theme::ActiveTheme;
 use ui::avatar::Avatar;
@@ -75,7 +72,7 @@ pub struct ChatPanel {
     subject_bar: Entity<bool>,
 
     /// Sent message ids
-    sent_ids: Arc<AsyncRwLock<Vec<EventId>>>,
+    sent_ids: Arc<Mutex<Vec<EventId>>>,
 
     /// Replies to
     replies_to: Entity<HashSet<EventId>>,
@@ -172,7 +169,7 @@ impl ChatPanel {
             attachments,
             rendered_texts_by_id: BTreeMap::new(),
             reports_by_id,
-            sent_ids: Arc::new(AsyncRwLock::new(Vec::new())),
+            sent_ids: Arc::new(Mutex::new(Vec::new())),
             uploading: false,
             subscriptions,
             tasks: vec![],
@@ -207,7 +204,7 @@ impl ChatPanel {
                         message,
                     } = *message
                 {
-                    let sent_ids = sent_ids.read().await;
+                    let sent_ids = sent_ids.lock().await;
 
                     if sent_ids.contains(&event_id) {
                         let status = if status {
@@ -378,7 +375,7 @@ impl ChatPanel {
         self.tasks.push(cx.spawn_in(window, async move |this, cx| {
             let outputs = send_task.await;
 
-            let mut sent_ids = sent_ids.write().await;
+            let mut sent_ids = sent_ids.lock().await;
             sent_ids.extend(outputs.iter().filter_map(|output| output.gift_wrap_id));
 
             this.update(cx, |this, cx| {
diff --git a/crates/device/src/lib.rs b/crates/device/src/lib.rs
index d3b5da3..98efdf7 100644
--- a/crates/device/src/lib.rs
+++ b/crates/device/src/lib.rs
@@ -225,6 +225,11 @@ impl DeviceRegistry {
             let keys = get_keys(&client, &signer).await?;
             let content = keys.secret_key().to_bech32()?;
 
+            if cfg!(target_arch = "wasm32") {
+                return Err(anyhow!("Not supported"));
+            }
+
+            #[cfg(not(target_arch = "wasm32"))]
             smol::fs::write(path, &content).await?;
 
             Ok(())