diff --git a/rosenpass/src/api/boilerplate/request_ref.rs b/rosenpass/src/api/boilerplate/request_ref.rs
index 2b2e1930..12f83b28 100644
--- a/rosenpass/src/api/boilerplate/request_ref.rs
+++ b/rosenpass/src/api/boilerplate/request_ref.rs
@@ -20,7 +20,7 @@ impl<B: SplitByteSlice> RequestRef<B> {
     /// # Examples
     ///
     /// ```
-    /// use zerocopy::AsBytes;
+    /// use zerocopy::IntoBytes;
     ///
     /// use rosenpass::api::{PingRequest, RequestRef, RequestMsgType};
     ///
diff --git a/rosenpass/src/api/boilerplate/response_ref.rs b/rosenpass/src/api/boilerplate/response_ref.rs
index 1f8b7dad..50b36142 100644
--- a/rosenpass/src/api/boilerplate/response_ref.rs
+++ b/rosenpass/src/api/boilerplate/response_ref.rs
@@ -23,7 +23,7 @@ impl<B: SplitByteSlice> ResponseRef<B> {
     /// # Examples
     ///
     /// ```
-    /// use zerocopy::AsBytes;
+    /// use zerocopy::IntoBytes;
     ///
     /// use rosenpass::api::{PingResponse, ResponseRef, ResponseMsgType};
     /// // Produce the original PingResponse
diff --git a/rosenpass/src/msgs.rs b/rosenpass/src/msgs.rs
index 21b1c363..7f05ca28 100644
--- a/rosenpass/src/msgs.rs
+++ b/rosenpass/src/msgs.rs
@@ -51,7 +51,7 @@ pub type MsgEnvelopeCookie = [u8; COOKIE_SIZE];
 ///
 /// ```
 /// use rosenpass::msgs::{Envelope, InitHello};
-/// use zerocopy::{IntoBytes, FromBytes, Ref};
+/// use zerocopy::{FromZeros, IntoBytes, FromBytes, Ref};
 /// use memoffset::offset_of;
 ///
 /// // Zero-initialization
@@ -106,7 +106,7 @@ pub struct Envelope<M: IntoBytes + FromBytes> {
 ///
 /// ```
 /// use rosenpass::msgs::{Envelope, InitHello};
-/// use zerocopy::{IntoBytes, FromBytes, Ref};
+/// use zerocopy::{FromZeros, IntoBytes, FromBytes, Ref};
 /// use memoffset::span_of;
 ///
 /// // Zero initialization
@@ -155,7 +155,7 @@ pub struct InitHello {
 ///
 /// ```
 /// use rosenpass::msgs::{Envelope, RespHello};
-/// use zerocopy::{IntoBytes, FromBytes, Ref};
+/// use zerocopy::{FromZeros, IntoBytes, FromBytes, Ref};
 /// use memoffset::span_of;
 ///
 /// // Zero initialization
@@ -206,7 +206,7 @@ pub struct RespHello {
 ///
 /// ```
 /// use rosenpass::msgs::{Envelope, InitConf};
-/// use zerocopy::{IntoBytes, FromBytes, Ref};
+/// use zerocopy::{IntoBytes, FromBytes, FromZeros, Ref};
 /// use memoffset::span_of;
 ///
 /// // Zero initialization
@@ -264,7 +264,7 @@ pub struct InitConf {
 ///
 /// ```
 /// use rosenpass::msgs::{Envelope, EmptyData};
-/// use zerocopy::{IntoBytes, FromBytes, Ref};
+/// use zerocopy::{FromZeros, IntoBytes, FromBytes, Ref};
 /// use memoffset::span_of;
 ///
 /// // Zero initialization
diff --git a/rosenpass/src/protocol/protocol.rs b/rosenpass/src/protocol/protocol.rs
index 0994000b..43ca38f8 100644
--- a/rosenpass/src/protocol/protocol.rs
+++ b/rosenpass/src/protocol/protocol.rs
@@ -464,7 +464,7 @@ pub type KnownResponseHash = Public<16>;
 /// # Examples
 ///
 /// ```
-/// use zerocopy::FromZeroes;
+/// use zerocopy::FromZeros;
 /// use rosenpass::protocol::KnownResponseHasher;
 /// use rosenpass::msgs::{Envelope, InitConf};
 ///
diff --git a/rosenpass/src/protocol/test.rs b/rosenpass/src/protocol/test.rs
index b5f58823..4d93e846 100644
--- a/rosenpass/src/protocol/test.rs
+++ b/rosenpass/src/protocol/test.rs
@@ -2,7 +2,7 @@ use std::{borrow::BorrowMut, fmt::Display, net::SocketAddrV4, ops::DerefMut};
 
 use anyhow::{Context, Result};
 use serial_test::serial;
-use zerocopy::{AsBytes, FromBytes, FromZeroes};
+use zerocopy::{FromBytes, FromZeros, Immutable, IntoBytes, KnownLayout};
 
 use rosenpass_cipher_traits::primitives::Kem;
 use rosenpass_ciphers::StaticKem;
@@ -538,10 +538,10 @@ fn init_conf_retransmission(protocol_version: ProtocolVersion) -> anyhow::Result
         srv.initiate_handshake(peer, buf.as_mut_slice())?
             .discard_result();
         let msg = truncating_cast_into::<Envelope<InitHello>>(buf.borrow_mut())?;
-        Ok(msg.read())
+        Ok(zerocopy::Ref::read(&msg))
     }
 
-    fn proc_msg<Rx: AsBytes + FromBytes, Tx: AsBytes + FromBytes>(
+    fn proc_msg<Rx: IntoBytes + FromBytes + Immutable, Tx: IntoBytes + FromBytes + Immutable>(
         srv: &mut CryptoServer,
         rx: &Envelope<Rx>,
     ) -> anyhow::Result<Envelope<Tx>> {
@@ -551,7 +551,7 @@ fn init_conf_retransmission(protocol_version: ProtocolVersion) -> anyhow::Result
             .context("Failed to produce RespHello message")?
             .discard_result();
         let msg = truncating_cast_into::<Envelope<Tx>>(buf.borrow_mut())?;
-        Ok(msg.read())
+        Ok(zerocopy::Ref::read(&msg))
     }
 
     fn proc_init_hello(
@@ -582,17 +582,21 @@ fn init_conf_retransmission(protocol_version: ProtocolVersion) -> anyhow::Result
     }
 
     // TODO: Implement Clone on our message types
-    fn clone_msg<Msg: AsBytes + FromBytes>(msg: &Msg) -> anyhow::Result<Msg> {
-        Ok(truncating_cast_into_nomut::<Msg>(msg.as_bytes())?.read())
+    fn clone_msg<Msg: IntoBytes + FromBytes + Immutable + KnownLayout>(
+        msg: &Msg,
+    ) -> anyhow::Result<Msg> {
+        Ok(zerocopy::Ref::read(&truncating_cast_into_nomut::<Msg>(
+            msg.as_bytes(),
+        )?))
     }
 
-    fn break_payload<Msg: AsBytes + FromBytes>(
+    fn break_payload<Msg: IntoBytes + FromBytes + Immutable + KnownLayout>(
         srv: &mut CryptoServer,
         peer: PeerPtr,
         msg: &Envelope<Msg>,
     ) -> anyhow::Result<Envelope<Msg>> {
         let mut msg = clone_msg(msg)?;
-        msg.as_bytes_mut()[memoffset::offset_of!(Envelope<Msg>, payload)] ^= 0x01;
+        msg.as_mut_bytes()[memoffset::offset_of!(Envelope<Msg>, payload)] ^= 0x01;
         msg.seal(peer, srv)?; // Recalculate seal; we do not want to focus on "seal broken" errs
         Ok(msg)
     }
diff --git a/rosenpass/tests/api-integration-tests-api-setup.rs b/rosenpass/tests/api-integration-tests-api-setup.rs
index 54ae051d..e35d8088 100644
--- a/rosenpass/tests/api-integration-tests-api-setup.rs
+++ b/rosenpass/tests/api-integration-tests-api-setup.rs
@@ -27,7 +27,7 @@ use rosenpass_util::{
 };
 use std::os::fd::{AsFd, AsRawFd};
 use tempfile::TempDir;
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 struct KillChild(std::process::Child);
 
diff --git a/rosenpass/tests/api-integration-tests.rs b/rosenpass/tests/api-integration-tests.rs
index ef54d281..241cefc0 100644
--- a/rosenpass/tests/api-integration-tests.rs
+++ b/rosenpass/tests/api-integration-tests.rs
@@ -14,7 +14,7 @@ use rosenpass_util::{
 };
 use rosenpass_util::{mem::DiscardResultExt, zerocopy::ZerocopySliceExt};
 use tempfile::TempDir;
-use zerocopy::AsBytes;
+use zerocopy::IntoBytes;
 
 use rosenpass::config::ProtocolVersion;
 use rosenpass::protocol::basic_types::SymKey;
diff --git a/util/tests/janitor.rs b/util/tests/janitor.rs
index 06612036..2eefcafa 100644
--- a/util/tests/janitor.rs
+++ b/util/tests/janitor.rs
@@ -47,7 +47,7 @@ async fn janitor_demo() -> anyhow::Result<()> {
             anyhow::Ok(())
         })
     }
-    .await;
+    .await?;
 
     // At this point, all background jobs have finished, now we can check the result of all our
     // additions