diff --git a/log/id.go b/log/id.go
index 7cac29d2a..e23ed3d5e 100644
--- a/log/id.go
+++ b/log/id.go
@@ -4,14 +4,8 @@ import (
 	"context"
 	"math/rand"
 	"time"
-
-	"github.com/sagernet/sing/common/random"
 )
 
-func init() {
-	random.InitializeSeed()
-}
-
 type idKey struct{}
 
 type ID struct {
diff --git a/protocol/dns/handle.go b/protocol/dns/handle.go
index e13235099..d7d89ca8a 100644
--- a/protocol/dns/handle.go
+++ b/protocol/dns/handle.go
@@ -82,7 +82,7 @@ func NewDNSPacketConnection(ctx context.Context, router adapter.DNSRouter, conn
 		}
 		break
 	}
-	fastClose, cancel := common.ContextWithCancelCause(ctx)
+	fastClose, cancel := context.WithCancelCause(ctx)
 	timeout := canceler.New(fastClose, cancel, C.DNSTimeout)
 	var group task.Group
 	group.Append0(func(_ context.Context) error {
@@ -150,7 +150,7 @@ func NewDNSPacketConnection(ctx context.Context, router adapter.DNSRouter, conn
 }
 
 func newDNSPacketConnection(ctx context.Context, router adapter.DNSRouter, conn N.PacketConn, readWaiter N.PacketReadWaiter, readCounters []N.CountFunc, cached []*N.PacketBuffer, metadata adapter.InboundContext) error {
-	fastClose, cancel := common.ContextWithCancelCause(ctx)
+	fastClose, cancel := context.WithCancelCause(ctx)
 	timeout := canceler.New(fastClose, cancel, C.DNSTimeout)
 	var group task.Group
 	group.Append0(func(_ context.Context) error {
diff --git a/protocol/tailscale/tun_device_unix.go b/protocol/tailscale/tun_device_unix.go
index a8d237abf..6df4e1044 100644
--- a/protocol/tailscale/tun_device_unix.go
+++ b/protocol/tailscale/tun_device_unix.go
@@ -11,7 +11,6 @@ import (
 	"sync/atomic"
 
 	singTun "github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/logger"
 	wgTun "github.com/sagernet/wireguard-go/tun"
 )
@@ -92,7 +91,7 @@ func (a *tunDeviceAdapter) Write(bufs [][]byte, offset int) (count int, err erro
 	for _, packet := range bufs {
 		a.debugPacket("write", packet[offset:])
 		if singTun.PacketOffset > 0 {
-			common.ClearArray(packet[offset-singTun.PacketOffset : offset])
+			clear(packet[offset-singTun.PacketOffset : offset])
 			singTun.PacketFillHeader(packet[offset-singTun.PacketOffset:], singTun.PacketIPVersion(packet[offset:]))
 		}
 		_, err = a.tun.Write(packet[offset-singTun.PacketOffset:])
diff --git a/transport/v2raygrpc/client.go b/transport/v2raygrpc/client.go
index 5af53856f..a915e1eb3 100644
--- a/transport/v2raygrpc/client.go
+++ b/transport/v2raygrpc/client.go
@@ -10,7 +10,6 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/tls"
 	"github.com/sagernet/sing-box/option"
-	"github.com/sagernet/sing/common"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 
@@ -100,7 +99,7 @@ func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
 		return nil, err
 	}
 	client := NewGunServiceClient(clientConn).(GunServiceCustomNameClient)
-	ctx, cancel := common.ContextWithCancelCause(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
 	stream, err := client.TunCustomName(ctx, c.serviceName)
 	if err != nil {
 		cancel(err)
diff --git a/transport/wireguard/client_bind.go b/transport/wireguard/client_bind.go
index 54b7be86c..e0e8b645a 100644
--- a/transport/wireguard/client_bind.go
+++ b/transport/wireguard/client_bind.go
@@ -136,7 +136,7 @@ func (c *ClientBind) receive(packets [][]byte, sizes []int, eps []conn.Endpoint)
 	sizes[0] = n
 	if n > 3 {
 		b := packets[0]
-		common.ClearArray(b[1:4])
+		clear(b[1:4])
 	}
 	eps[0] = remoteEndpoint(M.SocksaddrFromNet(addr).Unwrap().AddrPort())
 	count = 1
diff --git a/transport/wireguard/device_system.go b/transport/wireguard/device_system.go
index dcf2959b6..4e5d8da0f 100644
--- a/transport/wireguard/device_system.go
+++ b/transport/wireguard/device_system.go
@@ -147,7 +147,7 @@ func (w *systemDevice) Write(bufs [][]byte, offset int) (count int, err error) {
 	} else {
 		for _, packet := range bufs {
 			if tun.PacketOffset > 0 {
-				common.ClearArray(packet[offset-tun.PacketOffset : offset])
+				clear(packet[offset-tun.PacketOffset : offset])
 				tun.PacketFillHeader(packet[offset-tun.PacketOffset:], tun.PacketIPVersion(packet[offset:]))
 			}
 			_, err = w.device.Write(packet[offset-tun.PacketOffset:])
diff --git a/transport/wireguard/device_system_stack.go b/transport/wireguard/device_system_stack.go
index 94fd6f4f9..d3b47222a 100644
--- a/transport/wireguard/device_system_stack.go
+++ b/transport/wireguard/device_system_stack.go
@@ -20,7 +20,6 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing-tun/ping"
-	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/logger"
 	"github.com/sagernet/wireguard-go/device"
@@ -110,7 +109,7 @@ func (w *systemStackDevice) Write(bufs [][]byte, offset int) (count int, err err
 		for _, packet := range bufs {
 			if !w.writeStack(packet[offset:]) {
 				if tun.PacketOffset > 0 {
-					common.ClearArray(packet[offset-tun.PacketOffset : offset])
+					clear(packet[offset-tun.PacketOffset : offset])
 					tun.PacketFillHeader(packet[offset-tun.PacketOffset:], tun.PacketIPVersion(packet[offset:]))
 				}
 				_, err = w.device.Write(packet[offset-tun.PacketOffset:])