diff --git a/rust/serial_reader/Cargo.toml b/rust/serial_reader/Cargo.toml
index 462d484..054aec2 100644
--- a/rust/serial_reader/Cargo.toml
+++ b/rust/serial_reader/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-serialport = "4.2.0"
+serialport = "4.2.1"
 gtk = { version = "0.17.1", features = ["v3_24"] }
 anyhow = { version = "1.0.71", features = ["backtrace"] }
 glib = "0.17.9"