diff --git a/kernel/Cargo.lock b/kernel/Cargo.lock
index d2dd79e..603faef 100644
--- a/kernel/Cargo.lock
+++ b/kernel/Cargo.lock
@@ -125,12 +125,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "deque"
 version = "0.3.2"
-source = "git+https://github.com/rcore-os/deque.git?branch=no_std#907d03935b9badde1902d9c84d138872f34c6763"
+source = "git+https://github.com/rcore-os/deque.git?branch=no_std#b13a836dd69ae82cc0b8d711c2990b9baf5170d1"
 
 [[package]]
 name = "device_tree"
 version = "1.0.3"
-source = "git+https://github.com/rcore-os/device_tree-rs#0e887395ab92e99f68117b17d85b0b417bfd1b45"
+source = "git+https://github.com/rcore-os/device_tree-rs#7945459093f49a39996291283b8894753c8a638d"
 
 [[package]]
 name = "fixedvec"
diff --git a/kernel/src/drivers/input/virtio_input.rs b/kernel/src/drivers/input/virtio_input.rs
index 4f2d6a7..9ff1587 100644
--- a/kernel/src/drivers/input/virtio_input.rs
+++ b/kernel/src/drivers/input/virtio_input.rs
@@ -1,6 +1,8 @@
-use alloc::prelude::*;
+use alloc::boxed::Box;
+use alloc::string::String;
 use alloc::sync::Arc;
 use alloc::vec;
+use alloc::vec::Vec;
 use core::fmt;
 use core::mem::size_of;
 use core::mem::transmute_copy;
diff --git a/kernel/src/drivers/mod.rs b/kernel/src/drivers/mod.rs
index 1363330..61e64bb 100644
--- a/kernel/src/drivers/mod.rs
+++ b/kernel/src/drivers/mod.rs
@@ -1,5 +1,6 @@
-use alloc::prelude::*;
+use alloc::string::String;
 use alloc::sync::Arc;
+use alloc::vec::Vec;
 
 use lazy_static::lazy_static;
 use smoltcp::wire::{EthernetAddress, Ipv4Address};
diff --git a/kernel/src/drivers/net/e1000.rs b/kernel/src/drivers/net/e1000.rs
index 743070b..0917268 100644
--- a/kernel/src/drivers/net/e1000.rs
+++ b/kernel/src/drivers/net/e1000.rs
@@ -3,8 +3,9 @@
 
 use alloc::alloc::{GlobalAlloc, Layout};
 use alloc::format;
-use alloc::prelude::*;
+use alloc::string::String;
 use alloc::sync::Arc;
+use alloc::vec::Vec;
 use core::mem::size_of;
 use core::slice;
 use core::sync::atomic::{fence, Ordering};
diff --git a/kernel/src/drivers/net/ixgbe.rs b/kernel/src/drivers/net/ixgbe.rs
index fd96b7d..556739b 100644
--- a/kernel/src/drivers/net/ixgbe.rs
+++ b/kernel/src/drivers/net/ixgbe.rs
@@ -1,8 +1,9 @@
 //! Intel 10Gb Network Adapter 82599 i.e. ixgbe network driver
 //! Datasheet: https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/82599-10-gbe-controller-datasheet.pdf
 
-use alloc::prelude::*;
+use alloc::string::String;
 use alloc::sync::Arc;
+use alloc::vec::Vec;
 
 use alloc::collections::BTreeMap;
 use isomorphic_drivers::net::ethernet::intel::ixgbe;
diff --git a/kernel/src/drivers/net/virtio_net.rs b/kernel/src/drivers/net/virtio_net.rs
index 397bd5d..d149ec3 100644
--- a/kernel/src/drivers/net/virtio_net.rs
+++ b/kernel/src/drivers/net/virtio_net.rs
@@ -1,7 +1,8 @@
 use alloc::alloc::{GlobalAlloc, Layout};
 use alloc::format;
-use alloc::prelude::*;
+use alloc::string::String;
 use alloc::sync::Arc;
+use alloc::vec::Vec;
 use core::mem::size_of;
 use core::slice;