diff --git a/config/file/config.go b/config/file/config.go
index eeaa58c..0a7e15b 100644
--- a/config/file/config.go
+++ b/config/file/config.go
@@ -4,7 +4,6 @@ package file
 
 import (
 	"context"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sync"
@@ -27,7 +26,7 @@ type file struct {
 }
 
 func (c *file) Read() ([]byte, error) {
-	return ioutil.ReadFile(c.path)
+	return os.ReadFile(c.path)
 }
 
 // Watch listen for config changes and send updated content to the updates channel
diff --git a/config/file/config_test.go b/config/file/config_test.go
index fa331e2..7573288 100644
--- a/config/file/config_test.go
+++ b/config/file/config_test.go
@@ -4,7 +4,6 @@ package file
 
 import (
 	"context"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -20,7 +19,7 @@ import (
 
 func newConfigFile(t *testing.T) (config.Config, string, func()) {
 	path := filepath.Join(os.TempDir(), "config.yaml")
-	if err := ioutil.WriteFile(path, []byte("ok"), os.ModePerm); err != nil {
+	if err := os.WriteFile(path, []byte("ok"), os.ModePerm); err != nil {
 		t.Fatal(err)
 	}
 	cleanUp := func() {
@@ -32,14 +31,14 @@ func newConfigFile(t *testing.T) (config.Config, string, func()) {
 }
 
 func newSymlinkedConfigFile(t *testing.T) (config.Config, string, string, func()) {
-	watchDir, err := ioutil.TempDir("", "")
+	watchDir, err := os.MkdirTemp("", "")
 	require.Nil(t, err)
 	dataDir1 := path.Join(watchDir, "data1")
 	err = os.Mkdir(dataDir1, 0o777)
 	require.Nil(t, err)
 	realConfigFile := path.Join(dataDir1, "config.yaml")
 	t.Logf("Real config file location: %s\n", realConfigFile)
-	err = ioutil.WriteFile(realConfigFile, []byte("foo: bar\n"), 0o640)
+	err = os.WriteFile(realConfigFile, []byte("foo: bar\n"), 0o640)
 	require.Nil(t, err)
 	cleanup := func() {
 		os.RemoveAll(watchDir)
@@ -64,7 +63,7 @@ func TestWatch(t *testing.T) {
 			t.Fatal(err)
 		}
 		// when overwriting the file and waiting for the custom change notification handler to be triggered
-		err := ioutil.WriteFile(cpath, []byte("foo: baz\n"), 0o640)
+		err := os.WriteFile(cpath, []byte("foo: baz\n"), 0o640)
 		b := <-updates
 		// then the config value should have changed
 		require.Nil(t, err)
@@ -87,7 +86,7 @@ func TestWatch(t *testing.T) {
 		err := os.MkdirAll(dataDir2, 0o777)
 		require.NoError(t, err)
 		configFile2 := path.Join(dataDir2, "config.yaml")
-		err = ioutil.WriteFile(configFile2, []byte("foo: baz\n"), 0o640)
+		err = os.WriteFile(configFile2, []byte("foo: baz\n"), 0o640)
 		require.NoError(t, err)
 		// change the symlink using the `ln -sfn` command
 		err = exec.Command("ln", "-sfn", dataDir2, path.Join(watchDir, "data")).Run()
diff --git a/example/example.go b/example/example.go
index ed010b8..e5338bc 100644
--- a/example/example.go
+++ b/example/example.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strings"
 	"time"
@@ -267,7 +266,7 @@ func run(opts ...service.Option) {
 			log.Fatal(err)
 		}
 		defer resp.Body.Close()
-		b, err := ioutil.ReadAll(resp.Body)
+		b, err := io.ReadAll(resp.Body)
 		if err != nil {
 			log.Fatal(err)
 		}
diff --git a/registry/mdns/mdns.go b/registry/mdns/mdns.go
index 9b6a5f5..7f33abf 100644
--- a/registry/mdns/mdns.go
+++ b/registry/mdns/mdns.go
@@ -7,7 +7,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"strconv"
 	"strings"
@@ -122,7 +122,7 @@ func decode(record []string) (*mdnsTxt, error) {
 		return nil, err
 	}
 
-	rbuf, err := ioutil.ReadAll(zr)
+	rbuf, err := io.ReadAll(zr)
 	if err != nil {
 		return nil, err
 	}
diff --git a/service/options.go b/service/options.go
index e8da55a..f693b2c 100644
--- a/service/options.go
+++ b/service/options.go
@@ -6,8 +6,8 @@ import (
 	"crypto/x509"
 	"embed"
 	"fmt"
-	"io/ioutil"
 	"net"
+	"os"
 	"strings"
 
 	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
@@ -533,7 +533,7 @@ func (o *options) parseTLSConfig() error {
 		}
 		return nil
 	}
-	caCert, err := ioutil.ReadFile(o.caCert)
+	caCert, err := os.ReadFile(o.caCert)
 	if err != nil {
 		return err
 	}