diff --git a/tm4c123x-hal/Cargo.toml b/tm4c123x-hal/Cargo.toml
index 900edef..dd2fca9 100644
--- a/tm4c123x-hal/Cargo.toml
+++ b/tm4c123x-hal/Cargo.toml
@@ -26,7 +26,7 @@ version = "0.2.2"
 features = ["unproven"]
 
 [dependencies.nb]
-version = "0.1"
+version = "1"
 
 [dependencies.tm4c123x]
 version = "0.9"