diff --git a/harrogate/src/main.rs b/harrogate/src/main.rs
index d3b0724..1ce3068 100644
--- a/harrogate/src/main.rs
+++ b/harrogate/src/main.rs
@@ -1,6 +1,5 @@
 #![no_std]
 #![no_main]
-#![feature(destructuring_assignment)]
 
 use lights_hal::{boot, entry};
 
diff --git a/itsybitsy_m0_lights/src/lib.rs b/itsybitsy_m0_lights/src/lib.rs
index 66b3b6c..5fcc919 100644
--- a/itsybitsy_m0_lights/src/lib.rs
+++ b/itsybitsy_m0_lights/src/lib.rs
@@ -1,5 +1,4 @@
 #![no_std]
-#![feature(asm)]
 
 extern crate cortex_m;
 extern crate embedded_hal;
@@ -9,6 +8,7 @@ extern crate panic_halt;
 pub use cortex_m::asm::delay;
 pub use hal::entry;
 
+use core::arch::asm;
 use core::fmt::Debug;
 use core::sync::atomic::{compiler_fence, Ordering};
 use core::u8;