diff --git a/conn_linux_test.go b/conn_linux_test.go
index 2c13545..adcca19 100644
--- a/conn_linux_test.go
+++ b/conn_linux_test.go
@@ -2,7 +2,6 @@ package dbus
 
 import (
 	"bufio"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"syscall"
@@ -46,7 +45,7 @@ func startDaemonInDifferentUserNamespace(t *testing.T) (string, *os.Process) {
 	</policy>   
    </busconfig>
    `
-	cfg, err := ioutil.TempFile("", "")
+	cfg, err := os.CreateTemp("", "")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/conn_other.go b/conn_other.go
index 067e67c..1e99594 100644
--- a/conn_other.go
+++ b/conn_other.go
@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"os/user"
@@ -61,7 +60,7 @@ func tryDiscoverDbusSessionBusAddress() string {
 			// text file // containing the address of the socket, e.g.:
 			// DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-E1c73yNqrG
 
-			if f, err := ioutil.ReadFile(runUserSessionDbusFile); err == nil {
+			if f, err := os.ReadFile(runUserSessionDbusFile); err == nil {
 				fileContent := string(f)
 
 				prefix := "DBUS_SESSION_BUS_ADDRESS="
diff --git a/conn_test.go b/conn_test.go
index 9f64eca..f94dc96 100644
--- a/conn_test.go
+++ b/conn_test.go
@@ -5,7 +5,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"sync"
 	"testing"
@@ -171,7 +170,7 @@ func TestCloseBeforeSignal(t *testing.T) {
 	defer pipewriter.Close()
 	defer reader.Close()
 
-	bus, err := NewConn(rwc{Reader: reader, Writer: ioutil.Discard})
+	bus, err := NewConn(rwc{Reader: reader, Writer: io.Discard})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -743,7 +742,7 @@ func TestDisconnectCancelsConnectionContext(t *testing.T) {
 	defer pipewriter.Close()
 	defer reader.Close()
 
-	bus, err := NewConn(rwc{Reader: reader, Writer: ioutil.Discard})
+	bus, err := NewConn(rwc{Reader: reader, Writer: io.Discard})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -778,7 +777,7 @@ func TestCancellingContextClosesConnection(t *testing.T) {
 	defer pipewriter.Close()
 	defer reader.Close()
 
-	bus, err := NewConn(rwc{Reader: reader, Writer: ioutil.Discard}, WithContext(ctx))
+	bus, err := NewConn(rwc{Reader: reader, Writer: io.Discard}, WithContext(ctx))
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/proto_test.go b/proto_test.go
index 5352e0a..534a9ee 100644
--- a/proto_test.go
+++ b/proto_test.go
@@ -3,7 +3,7 @@ package dbus
 import (
 	"bytes"
 	"encoding/binary"
-	"io/ioutil"
+	"io"
 	"math"
 	"reflect"
 	"testing"
@@ -371,7 +371,7 @@ func BenchmarkDecodeMessageBig(b *testing.B) {
 func BenchmarkEncodeMessageSmall(b *testing.B) {
 	var err error
 	for i := 0; i < b.N; i++ {
-		err = smallMessage.EncodeTo(ioutil.Discard, binary.LittleEndian)
+		err = smallMessage.EncodeTo(io.Discard, binary.LittleEndian)
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -381,7 +381,7 @@ func BenchmarkEncodeMessageSmall(b *testing.B) {
 func BenchmarkEncodeMessageBig(b *testing.B) {
 	var err error
 	for i := 0; i < b.N; i++ {
-		err = bigMessage.EncodeTo(ioutil.Discard, binary.LittleEndian)
+		err = bigMessage.EncodeTo(io.Discard, binary.LittleEndian)
 		if err != nil {
 			b.Fatal(err)
 		}
diff --git a/transport_nonce_tcp.go b/transport_nonce_tcp.go
index a61a820..a08d089 100644
--- a/transport_nonce_tcp.go
+++ b/transport_nonce_tcp.go
@@ -5,8 +5,8 @@ package dbus
 
 import (
 	"errors"
-	"io/ioutil"
 	"net"
+	"os"
 )
 
 func init() {
@@ -28,7 +28,7 @@ func newNonceTcpTransport(keys string) (transport, error) {
 	if err != nil {
 		return nil, err
 	}
-	b, err := ioutil.ReadFile(noncefile)
+	b, err := os.ReadFile(noncefile)
 	if err != nil {
 		return nil, err
 	}
diff --git a/transport_nonce_tcp_test.go b/transport_nonce_tcp_test.go
index c9075c3..a941584 100644
--- a/transport_nonce_tcp_test.go
+++ b/transport_nonce_tcp_test.go
@@ -2,7 +2,6 @@ package dbus
 
 import (
 	"bufio"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"testing"
@@ -38,7 +37,7 @@ func TestTcpNonceConnection(t *testing.T) {
 // startDaemon starts a dbus-daemon instance with the given config
 // and returns its address string and underlying process.
 func startDaemon(t *testing.T, config string) (string, *os.Process) {
-	cfg, err := ioutil.TempFile("", "")
+	cfg, err := os.CreateTemp("", "")
 	if err != nil {
 		t.Fatal(err)
 	}