diff --git a/rust/pico/Cargo.toml b/rust/pico/Cargo.toml
index a5662f2..4969dc1 100644
--- a/rust/pico/Cargo.toml
+++ b/rust/pico/Cargo.toml
@@ -10,7 +10,7 @@ embedded-hal = { version = "0.2.7", features = ["unproven"] }
 embedded-time = "0.12.1"
 
 defmt = "0.3.2"
-defmt-rtt = "0.3"
+defmt-rtt = "0.4"
 panic-probe = { version = "0.3.0", features = ["print-defmt"] }
 
 usb-device= "0.2.9"