diff --git a/CHANGELOG.md b/CHANGELOG.md
index e072fa1c3..d009f13aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * fix(backup-download) Now download the last successful backup [#663](https://github.com/Scalingo/cli/pull/663)
 * fix(review-app-url) add app url in the tablewriter [#664](https://github.com/Scalingo/cli/pull/664)
 * fix(backups-download) print error on stderr if the backup status is not 'done' [#665](https://github.com/Scalingo/cli/pull/665)
+* update go version to 1.6 and replace ioutil by io/os [#666](https://github.com/Scalingo/cli/pull/666)
 
 ### 1.20.2
 
diff --git a/apps/logs.go b/apps/logs.go
index e72364736..4e337d5eb 100644
--- a/apps/logs.go
+++ b/apps/logs.go
@@ -2,7 +2,7 @@ package apps
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"strings"
 	"time"
 
@@ -45,7 +45,7 @@ func Logs(appName string, stream bool, n int, filter string) error {
 		return errgo.Newf("fail to query logs: %s", res.Status)
 	}
 
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return errgo.Mask(err, errgo.Any)
 	}
diff --git a/apps/run.go b/apps/run.go
index c5a48afc0..22c8c8f1e 100644
--- a/apps/run.go
+++ b/apps/run.go
@@ -8,7 +8,6 @@ import (
 	"encoding/json"
 	"fmt"
 	stdio "io"
-	"io/ioutil"
 	"mime/multipart"
 	"net"
 	"net/http"
@@ -273,7 +272,7 @@ func (ctx *runContext) exitCode() (int, error) {
 	}
 	defer res.Body.Close()
 
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := stdio.ReadAll(res.Body)
 	if err != nil {
 		return -1, errgo.Notef(err, "fail to read body when getting exit code")
 	}
@@ -394,7 +393,7 @@ func (ctx *runContext) uploadFiles(endpoint string, files []string) error {
 }
 
 func (ctx *runContext) compressDir(dir string) (string, error) {
-	tmpDir, err := ioutil.TempDir(os.TempDir(), "job-file")
+	tmpDir, err := os.MkdirTemp(os.TempDir(), "job-file")
 	if err != nil {
 		return "", errgo.Mask(err, errgo.Any)
 	}
@@ -523,7 +522,7 @@ func (ctx *runContext) uploadFile(endpoint string, file string) error {
 	}
 	defer res.Body.Close()
 	if res.StatusCode != 200 {
-		b, _ := ioutil.ReadAll(res.Body)
+		b, _ := stdio.ReadAll(res.Body)
 		return errgo.Newf("Invalid return code %v (%s)", res.Status, strings.TrimSpace(string(b)))
 	}
 	return nil
diff --git a/cmd/autocomplete/current_app.go b/cmd/autocomplete/current_app.go
index 7cee935d8..bb22b7c01 100644
--- a/cmd/autocomplete/current_app.go
+++ b/cmd/autocomplete/current_app.go
@@ -3,8 +3,8 @@ package autocomplete
 import (
 	"os"
 
-	"github.com/urfave/cli"
 	"github.com/Scalingo/cli/appdetect"
+	"github.com/urfave/cli"
 )
 
 func CurrentAppCompletion(c *cli.Context) string {
diff --git a/config/auth.go b/config/auth.go
index 2a99be851..4ee9e7682 100644
--- a/config/auth.go
+++ b/config/auth.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"strings"
@@ -300,7 +299,7 @@ func writeAuthFile(authConfig *auth.ConfigData) error {
 
 func existingAuth() (*auth.ConfigData, error) {
 	authConfig := auth.NewConfigData()
-	content, err := ioutil.ReadFile(C.AuthFile)
+	content, err := os.ReadFile(C.AuthFile)
 	if err == nil {
 		// We don't care of the error
 		json.Unmarshal(content, &authConfig)
diff --git a/crypto/sshkeys/read.go b/crypto/sshkeys/read.go
index fe79f9477..82ad82576 100644
--- a/crypto/sshkeys/read.go
+++ b/crypto/sshkeys/read.go
@@ -4,7 +4,7 @@ import (
 	"encoding/asn1"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -19,7 +19,7 @@ var (
 )
 
 func ReadPrivateKey(path string) (ssh.Signer, error) {
-	privateKeyContent, err := ioutil.ReadFile(path)
+	privateKeyContent, err := os.ReadFile(path)
 	if err != nil {
 		return nil, errgo.Mask(err)
 	}
diff --git a/db/backup_download.go b/db/backup_download.go
index e4a3d30f5..c2263c874 100644
--- a/db/backup_download.go
+++ b/db/backup_download.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	httpclient "github.com/Scalingo/go-scalingo/v4/http"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"time"
@@ -37,7 +36,7 @@ func DownloadBackup(app, addon, backupID string, opts DownloadBackupOpts) error
 	}
 
 	if opts.Silent {
-		logWriter = ioutil.Discard
+		logWriter = io.Discard
 	}
 
 	client, err := config.ScalingoClient()
@@ -109,8 +108,8 @@ func DownloadBackup(app, addon, backupID string, opts DownloadBackupOpts) error
 
 	if resp.StatusCode != http.StatusOK {
 		return httpclient.NewRequestFailedError(resp, &httpclient.APIRequest{
-			URL:         downloadURL,
-			Method:      "GET",
+			URL:    downloadURL,
+			Method: "GET",
 		})
 	}
 
diff --git a/deployments/deploy.go b/deployments/deploy.go
index b4f3fb3ef..7850a8395 100644
--- a/deployments/deploy.go
+++ b/deployments/deploy.go
@@ -2,7 +2,6 @@ package deployments
 
 import (
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -90,7 +89,7 @@ func uploadArchivePath(c *scalingo.Client, archivePath string) (string, error) {
 	}
 	defer res.Body.Close()
 	if res.StatusCode != http.StatusOK {
-		body, _ := ioutil.ReadAll(res.Body)
+		body, _ := io.ReadAll(res.Body)
 		return "", errgo.Newf("wrong status code after upload %s, body: %s", res.Status, string(body))
 	}
 
diff --git a/domains/ssl.go b/domains/ssl.go
index dbbfe2559..2af14df0b 100644
--- a/domains/ssl.go
+++ b/domains/ssl.go
@@ -1,7 +1,7 @@
 package domains
 
 import (
-	"io/ioutil"
+	"os"
 
 	"github.com/Scalingo/cli/config"
 	"github.com/Scalingo/cli/io"
@@ -65,11 +65,11 @@ func validateSSL(cert, key string) (string, string, error) {
 		return "", "", errgo.New("--key <key path> should be defined")
 	}
 
-	certContent, err := ioutil.ReadFile(cert)
+	certContent, err := os.ReadFile(cert)
 	if err != nil {
 		return "", "", errgo.Mask(err)
 	}
-	keyContent, err := ioutil.ReadFile(key)
+	keyContent, err := os.ReadFile(key)
 	if err != nil {
 		return "", "", errgo.Mask(err)
 	}
diff --git a/go.mod b/go.mod
index 6e4ef7531..503c3ad92 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/Scalingo/cli
 
-go 1.15
+go 1.16
 
 require (
 	github.com/ScaleFT/sshkeys v0.0.0-20200327173127-6142f742bca5
diff --git a/keys/add.go b/keys/add.go
index 7241b9c67..eca96f15f 100644
--- a/keys/add.go
+++ b/keys/add.go
@@ -2,7 +2,6 @@ package keys
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/Scalingo/cli/config"
@@ -21,7 +20,7 @@ func Add(name string, path string) error {
 		return fmt.Errorf("%s: is too large (%v bytes)", path, stat.Size())
 	}
 
-	keyContent, err := ioutil.ReadFile(path)
+	keyContent, err := os.ReadFile(path)
 	if err != nil {
 		return errgo.Notef(err, "fail to read the key file")
 	}
diff --git a/update/check.go b/update/check.go
index ecabba69a..29796a0d9 100644
--- a/update/check.go
+++ b/update/check.go
@@ -2,7 +2,7 @@ package update
 
 import (
 	"fmt"
-	"io/ioutil"
+	stdio "io"
 	"net/http"
 	"strings"
 	"time"
@@ -72,7 +72,7 @@ func getLastVersion() (string, error) {
 		return "", errgo.Mask(err)
 	}
 	defer res.Body.Close()
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := stdio.ReadAll(res.Body)
 	if err != nil {
 		return "", errgo.Mask(err)
 	}