diff --git a/Cargo.toml b/Cargo.toml
index b8a151b..b4aac9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,9 +7,10 @@ keywords = ["volatile"]
 description = "A simple volatile wrapper type"
 documentation = "https://docs.rs/volatile"
 repository = "https://github.com/phil-opp/volatile"
+edition = "2021"
 
 [dependencies]
-zerocopy = { version = "0.5.0", optional = true }
+zerocopy = { version = "0.6.1", optional = true }
 
 [features]
 default = [ "zerocopy" ]
diff --git a/src/lib.rs b/src/lib.rs
index 6c5688d..750bb68 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,8 +24,6 @@
 //! and then perform operations on the pointer as usual in a volatile way. This method works as all
 //! of the volatile wrapper types are the same size as their contained values.
 #![no_std]
-#![feature(const_fn_trait_bound)]
-#[cfg(feature = "zerocopy")] extern crate zerocopy;
 
 use core::ptr;
 #[cfg(feature = "zerocopy")] use zerocopy::FromBytes;