diff --git a/device/device_test.go b/device/device_test.go
index 02b1c35..7958fb9 100644
--- a/device/device_test.go
+++ b/device/device_test.go
@@ -10,7 +10,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"math/rand"
 	"net"
 	"runtime"
@@ -402,7 +402,7 @@ func BenchmarkUAPIGet(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		pair[0].dev.IpcGetOperation(ioutil.Discard)
+		pair[0].dev.IpcGetOperation(io.Discard)
 	}
 }
 
diff --git a/tun/tun_darwin.go b/tun/tun_darwin.go
index f513d03..542f666 100644
--- a/tun/tun_darwin.go
+++ b/tun/tun_darwin.go
@@ -8,7 +8,6 @@ package tun
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"syscall"
@@ -138,7 +137,7 @@ func CreateTUN(name string, mtu int) (Device, error) {
 	if err == nil && name == "utun" {
 		fname := os.Getenv("WG_TUN_NAME_FILE")
 		if fname != "" {
-			ioutil.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
+			os.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
 		}
 	}
 
diff --git a/tun/tun_openbsd.go b/tun/tun_openbsd.go
index b2815d7..8fca1e3 100644
--- a/tun/tun_openbsd.go
+++ b/tun/tun_openbsd.go
@@ -8,7 +8,6 @@ package tun
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"syscall"
@@ -132,7 +131,7 @@ func CreateTUN(name string, mtu int) (Device, error) {
 	if err == nil && name == "tun" {
 		fname := os.Getenv("WG_TUN_NAME_FILE")
 		if fname != "" {
-			ioutil.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
+			os.WriteFile(fname, []byte(tun.(*NativeTun).name+"\n"), 0400)
 		}
 	}