diff --git a/src/lib.rs b/src/lib.rs
index 1016168..c0853b5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,4 @@
-#![cfg_attr(feature = "nightly", feature(maybe_uninit_ref))]
 #![cfg_attr(feature = "nightly", feature(never_type))]
-#![cfg_attr(all(feature = "std", feature = "nightly"), feature(read_initializer))]
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(feature = "std", allow(dead_code))]