diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 5d84502c..46a8d8e7 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -20,7 +20,7 @@ tauri = { version = "2.11.3", features = [] }
 # generate_context! expands plugin config (plugins.updater) via serde_json.
 serde_json = "1"
 serde = { version = "1", features = ["derive"] }
-tokio = { version = "1", features = ["net", "time", "io-util", "rt"] }
+tokio = { version = "1.53.3", features = ["net", "time", "io-util", "rt"] }
 # Preview proxy only (redirects disabled there); rustls to match sqlx.
 reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
 base64 = "0.23"
diff --git a/src-tauri/src/usb.rs b/src-tauri/src/usb.rs
index 1f0b66d0..c0fe3b3f 100644
--- a/src-tauri/src/usb.rs
+++ b/src-tauri/src/usb.rs
@@ -431,7 +431,8 @@ mod lp_io {
 
   impl LpDevice {
     pub(super) fn new(file: File) -> std::io::Result<Self> {
-      Ok(Self(AsyncFd::new(file)?))
+      // SAFETY: the File owns the fd for the whole lifetime of the AsyncFd.
+      Ok(Self(unsafe { AsyncFd::register(file) }?))
     }
   }