diff --git a/admin.go b/admin.go
index 1d8ed20..ca685c3 100644
--- a/admin.go
+++ b/admin.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/user"
@@ -89,7 +88,7 @@ func (cmd *adminCmd) parseArgs(as []string) {
 	cmd.deleteTopic = args.deleteTopic
 
 	if cmd.createTopic != "" {
-		buf, err := ioutil.ReadFile(args.topicDetailPath)
+		buf, err := os.ReadFile(args.topicDetailPath)
 		if err != nil {
 			failf("failed to read topic detail err=%v", err)
 		}
diff --git a/common.go b/common.go
index 62f1198..550fabb 100644
--- a/common.go
+++ b/common.go
@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"path/filepath"
@@ -177,7 +176,7 @@ func setupCerts(certPath, caPath, keyPath string) (*tls.Config, error) {
 		return nil, err
 	}
 
-	caString, err := ioutil.ReadFile(caPath)
+	caString, err := os.ReadFile(caPath)
 	if err != nil {
 		return nil, err
 	}
@@ -242,7 +241,7 @@ func setupAuthTLS1Way(auth authConfig, saramaCfg *sarama.Config) error {
 		return nil
 	}
 
-	caString, err := ioutil.ReadFile(auth.CACert)
+	caString, err := os.ReadFile(auth.CACert)
 	if err != nil {
 		return fmt.Errorf("failed to read ca-certificate err=%v", err)
 	}
@@ -265,7 +264,7 @@ func setupAuthTLS(auth authConfig, saramaCfg *sarama.Config) error {
 		return fmt.Errorf("client-certificate, client-certificate-key and ca-certificate are required - got auth=%#v", auth)
 	}
 
-	caString, err := ioutil.ReadFile(auth.CACert)
+	caString, err := os.ReadFile(auth.CACert)
 	if err != nil {
 		return fmt.Errorf("failed to read ca-certificate err=%v", err)
 	}
@@ -306,7 +305,7 @@ func readAuthFile(argFN string, envFN string, target *authConfig) {
 		fn = envFN
 	}
 
-	byts, err := ioutil.ReadFile(fn)
+	byts, err := os.ReadFile(fn)
 	if err != nil {
 		failf("failed to read auth file err=%v", err)
 	}
diff --git a/system_test.go b/system_test.go
index 9672c6a..b8aebfa 100644
--- a/system_test.go
+++ b/system_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"sort"
@@ -76,7 +75,7 @@ func TestSystem(t *testing.T) {
 	buf, err := json.Marshal(topicDetail)
 	require.NoError(t, err)
 	fnTopicDetail := fmt.Sprintf("topic-detail-%v.json", randomString(6))
-	err = ioutil.WriteFile(fnTopicDetail, buf, 0666)
+	err = os.WriteFile(fnTopicDetail, buf, 0666)
 	require.NoError(t, err)
 	defer os.RemoveAll(fnTopicDetail)