diff --git a/pkgs/httpcompress/httpCompress.go b/pkgs/httpcompress/httpCompress.go
index 87f3195..d153d2f 100644
--- a/pkgs/httpcompress/httpCompress.go
+++ b/pkgs/httpcompress/httpCompress.go
@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"errors"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"strings"
@@ -98,7 +97,7 @@ func (c *Compressor) SetEncoder(encoding string, fn EncoderFunc) {
 
 	c.pooledEncoders[encoding] = &sync.Pool{
 		New: func() interface{} {
-			return fn(ioutil.Discard, c.level)
+			return fn(io.Discard, c.level)
 		},
 	}
 
diff --git a/pkgs/mocksmtp/backend.go b/pkgs/mocksmtp/backend.go
index 6855958..686e0d5 100644
--- a/pkgs/mocksmtp/backend.go
+++ b/pkgs/mocksmtp/backend.go
@@ -2,7 +2,6 @@ package mocksmtp
 
 import (
 	"io"
-	"io/ioutil"
 
 	"github.com/emersion/go-smtp"
 )
@@ -53,7 +52,7 @@ func (s *session) Rcpt(to string) error {
 }
 
 func (s *session) Data(r io.Reader) error {
-	if b, err := ioutil.ReadAll(r); err != nil {
+	if b, err := io.ReadAll(r); err != nil {
 		return err
 	} else {
 		s.values.Datas = append(s.values.Datas, b)