cmd/sgblog-comment-add/mail.go | 3 +--
 cmd/sgblog-comment-add/main.go | 4 ++--
 cmd/sgblog/main.go             | 4 ++--
 common.go                      | 4 ++--

diff --git a/cmd/sgblog-comment-add/mail.go b/cmd/sgblog-comment-add/mail.go
index 3b442175325bd336b50cd6c34fe821b1519645c3e7117962a5f35dac7e069206..61c13fad445ce1fb9f7aa9f1ce8b454c146705b209aaa7893e5409e485ec4876 100644
--- a/cmd/sgblog-comment-add/mail.go
+++ b/cmd/sgblog-comment-add/mail.go
@@ -22,7 +22,6 @@ 	"bytes"
 	"encoding/base64"
 	"errors"
 	"io"
-	"io/ioutil"
 	"mime"
 	"mime/multipart"
 	"mime/quotedprintable"
@@ -84,7 +83,7 @@ 	if len(boundary) == 0 {
 		err = errors.New("no boundary string")
 		return
 	}
-	data, err := ioutil.ReadAll(msg.Body)
+	data, err := io.ReadAll(msg.Body)
 	if err != nil {
 		return
 	}
diff --git a/cmd/sgblog-comment-add/main.go b/cmd/sgblog-comment-add/main.go
index 09de6cb055bc85d2120a2a73bf301dfda72d48e3cdd89496f2e1f4a39c002a18..7c23dc7dc61b76d6fc4f21bde36acca1e7956ab5b36bc4caf357d967f4019878 100644
--- a/cmd/sgblog-comment-add/main.go
+++ b/cmd/sgblog-comment-add/main.go
@@ -24,7 +24,7 @@ 	"crypto/sha1"
 	"encoding/hex"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"mime"
 	"net/mail"
@@ -103,7 +103,7 @@ 	subj, r, err := parseEmail(msg)
 	if err != nil {
 		log.Fatal(err)
 	}
-	body, err := ioutil.ReadAll(r)
+	body, err := io.ReadAll(r)
 	if err != nil {
 		log.Fatal(err)
 	}
diff --git a/cmd/sgblog/main.go b/cmd/sgblog/main.go
index 48ed0d5dc4bfb88cf4a79743075c23dd2cdc9bf4f5b1dcac1c98da4d5eca837a..e31671e1bc8d93a23686132a5666978778412cc16022c2694814e6696c78fae8 100644
--- a/cmd/sgblog/main.go
+++ b/cmd/sgblog/main.go
@@ -23,8 +23,8 @@ 	"crypto/sha1"
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
+	"os"
 	"regexp"
 	"strings"
 
@@ -126,7 +126,7 @@ 	return &headHash, nil
 }
 
 func readCfg(cfgPath string) (*Cfg, error) {
-	cfgRaw, err := ioutil.ReadFile(cfgPath)
+	cfgRaw, err := os.ReadFile(cfgPath)
 	if err != nil {
 		return nil, err
 	}
diff --git a/common.go b/common.go
index 1ec5609267f04cacf954d8e30742c6e57d52f4801ebf7566df3125085b33e990..172ecac91647ed708dfbe96d37c9ad0a3266afc1b5e820fa4091ebf9965c33a3 100644
--- a/common.go
+++ b/common.go
@@ -4,7 +4,7 @@
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"sort"
 	"text/scanner"
 
@@ -81,7 +81,7 @@ 	r, err := blob.Reader()
 	if err != nil {
 		return nil
 	}
-	data, err := ioutil.ReadAll(r)
+	data, err := io.ReadAll(r)
 	if err != nil {
 		return nil
 	}