diff --git a/examples/wasmtime/Cargo.toml b/examples/wasmtime/Cargo.toml
index fe2368f41..373ccb2ae 100644
--- a/examples/wasmtime/Cargo.toml
+++ b/examples/wasmtime/Cargo.toml
@@ -19,7 +19,7 @@ log = { version = "0.4" } #, features = ["kv_unstable"]}
 simple_logger = { version = "5.0", default-features = false }
 # FIXME: remove `gc` feature once upgraded to wasmtime 25:
 wasmtime = { version = "24.0", default-features = false, features = ["std", "gc", "runtime", "cranelift", "threads", "parallel-compilation"] } #"pooling-allocator", "incremental-cache", "wat", "gc", "component-model"] }
-zerocopy = { version = "0.7", default-features = false, features = ["alloc", "derive", "simd-nightly"] }
+zerocopy = { version = "0.8", default-features = false, features = ["alloc", "derive", "simd-nightly"] }
 
 [target.'cfg(target_os = "hermit")'.dependencies]
 hermit = { path = "../../hermit", default-features = false, features = ["acpi", "pci", "fsgsbase", "fs", "tcp", "dhcpv4", "mmap"] }
diff --git a/examples/wasmtime/src/preview1.rs b/examples/wasmtime/src/preview1.rs
index b3a51c79c..b99222a6e 100644
--- a/examples/wasmtime/src/preview1.rs
+++ b/examples/wasmtime/src/preview1.rs
@@ -15,7 +15,7 @@ use bitflags::bitflags;
 use log::debug;
 use wasi::*;
 use wasmtime::{AsContext, AsContextMut, Caller, Extern};
-use zerocopy::AsBytes;
+use zerocopy::{IntoBytes, KnownLayout, Immutable};
 
 static FD: Mutex<Vec<Descriptor>> = Mutex::new(Vec::new());
 
@@ -74,7 +74,7 @@ const SOCKET_STREAM: u8 = 1 << 5;
 /// The file refers to a symbolic link inode.
 const SYMBOLIC_LINK: u8 = 1 << 6;
 
-#[derive(Debug, Copy, Clone, Default, AsBytes)]
+#[derive(Debug, Copy, Clone, Default, IntoBytes, KnownLayout, Immutable)]
 #[repr(C)]
 pub(crate) struct FileStat {
 	pub dev: u64,
@@ -90,7 +90,7 @@ pub(crate) struct FileStat {
 	pub ctim: u64,
 }
 
-#[derive(Debug, Copy, Clone, Default, AsBytes)]
+#[derive(Debug, Copy, Clone, Default, IntoBytes, KnownLayout, Immutable)]
 #[repr(C)]
 pub(crate) struct FdStat {
 	pub filetype: u8,
@@ -191,7 +191,7 @@ pub(crate) fn init<T>(linker: &mut wasmtime::Linker<T>) -> Result<()> {
 					let _ = mem.read(
 						caller.as_context_mut(),
 						path_ptr.try_into().unwrap(),
-						path.as_bytes_mut(),
+						path.as_mut_bytes(),
 					);
 					let path = "/".to_owned() + std::str::from_utf8(&path).unwrap();
 
@@ -250,7 +250,7 @@ pub(crate) fn init<T>(linker: &mut wasmtime::Linker<T>) -> Result<()> {
 					let _ = mem.read(
 						caller.as_context_mut(),
 						path_ptr.try_into().unwrap(),
-						path.as_bytes_mut(),
+						path.as_mut_bytes(),
 					);
 
 					let path = "/".to_owned() + std::str::from_utf8(&path).unwrap();
@@ -469,7 +469,7 @@ pub(crate) fn init<T>(linker: &mut wasmtime::Linker<T>) -> Result<()> {
 					let _ = mem.read(
 						caller.as_context(),
 						iovs_ptr.try_into().unwrap(),
-						iovs.as_bytes_mut(),
+						iovs.as_mut_bytes(),
 					);
 
 					let mut nread_bytes: i32 = 0;
@@ -594,7 +594,7 @@ pub(crate) fn init<T>(linker: &mut wasmtime::Linker<T>) -> Result<()> {
 					let _ = mem.read(
 						caller.as_context(),
 						iovs_ptr.try_into().unwrap(),
-						iovs.as_bytes_mut(),
+						iovs.as_mut_bytes(),
 					);
 
 					let mut nwritten_bytes: i32 = 0;