diff --git a/config.go b/config.go
index c22b792d..cdd4f48c 100644
--- a/config.go
+++ b/config.go
@@ -1,8 +1,8 @@
 package sls
 
 const (
-	version         = "0.6.0"     // SDK version
-	signatureMethod = "hmac-sha1" // Signature method
+	version         = "0.6.0"       // SDK version
+	signatureMethod = "hmac-sha256" // Signature method
 
 	// OffsetNewest stands for the log head offset, i.e. the offset that will be
 	// assigned to the next message that will be produced to the shard.
diff --git a/signature.go b/signature.go
index 7e8d8aab..9adc2f79 100644
--- a/signature.go
+++ b/signature.go
@@ -3,7 +3,7 @@ package sls
 import (
 	"crypto/hmac"
 	"crypto/md5"
-	"crypto/sha1"
+	"crypto/sha256"
 	"encoding/base64"
 	"fmt"
 	"net/url"
@@ -137,8 +137,8 @@ func (s *SignerV1) Sign(method, uri string, headers map[string]string, body []by
 		canoHeaders + "\n" +
 		canoResource
 
-	// Signature = base64(hmac-sha1(UTF8-Encoding-Of(SignString)，AccessKeySecret))
-	mac := hmac.New(sha1.New, []byte(s.accessKeySecret))
+	// Signature = base64(hmac-sha256(UTF8-Encoding-Of(SignString)，AccessKeySecret))
+	mac := hmac.New(sha256.New, []byte(s.accessKeySecret))
 	_, err = mac.Write([]byte(signStr))
 	if err != nil {
 		return err
diff --git a/signature_test.go b/signature_test.go
index a86f05ff..19d21199 100644
--- a/signature_test.go
+++ b/signature_test.go
@@ -3,10 +3,13 @@ package sls
 import (
 	"crypto/md5"
 	"fmt"
+	"testing"
+	"time"
+
+	"github.com/Netflix/go-env"
 	"github.com/gogo/protobuf/proto"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
-	"testing"
 )
 
 type SignerV1Suite struct {
@@ -14,8 +17,9 @@ type SignerV1Suite struct {
 	AccessKeyID     string
 	AccessKeySecret string
 	Endpoint        string
-
-	signer Signer
+	env             TestEnvInfo
+	signer          Signer
+	client          ClientInterface
 }
 
 func (s *SignerV1Suite) SetupTest() {
@@ -26,16 +30,21 @@ func (s *SignerV1Suite) SetupTest() {
 		accessKeyID:     s.AccessKeyID,
 		accessKeySecret: s.AccessKeySecret,
 	}
+	_, err := env.UnmarshalFromEnviron(&s.env)
+	s.Require().NoError(err)
+	s.client = CreateNormalInterface(s.env.Endpoint,
+		s.env.AccessKeyID,
+		s.env.AccessKeySecret, "")
 }
 
 func (s *SignerV1Suite) TestSignatureGet() {
 	headers := map[string]string{
 		"x-log-apiversion":      "0.6.0",
-		"x-log-signaturemethod": "hmac-sha1",
+		"x-log-signaturemethod": "hmac-sha256",
 		"x-log-bodyrawsize":     "0",
 		"Date":                  "Mon, 3 Jan 2010 08:33:47 GMT",
 	}
-	digest := "Rwm6cTKzoti4HWoe+GKcb6Kv07E="
+	digest := "hNNf3Nv33R//Gxu++a0anEi7d5xbS5gapaPd/6eIxTk="
 	expectedAuthStr := fmt.Sprintf("SLS %v:%v", s.AccessKeyID, digest)
 
 	err := s.signer.Sign("GET", "/logstores", headers, nil)
@@ -87,7 +96,7 @@ func (s *SignerV1Suite) TestSignaturePost() {
 	}
 	h := map[string]string{
 		"x-log-apiversion":      "0.6.0",
-		"x-log-signaturemethod": "hmac-sha1",
+		"x-log-signaturemethod": "hmac-sha256",
 		"x-log-bodyrawsize":     "50",
 		"Content-MD5":           md5Sum,
 		"Content-Type":          "application/x-protobuf",
@@ -95,7 +104,7 @@ func (s *SignerV1Suite) TestSignaturePost() {
 		"Date":                  "Mon, 3 Jan 2010 08:33:47 GMT",
 	}
 
-	digest := "87xQWqFaOSewqRIma8kPjGYlXHc="
+	digest := "GGHiEECbn3P3QaMh2fLMs94z95xDVeQmhULhe54o0S4="
 	err = s.signer.Sign("GET", "/logstores/app_log", h, body)
 	if err != nil {
 		assert.Fail(s.T(), err.Error())
@@ -105,6 +114,47 @@ func (s *SignerV1Suite) TestSignaturePost() {
 	assert.Equal(s.T(), expectedAuthStr, auth)
 }
 
+func (s *SignerV1Suite) TestSignV1Req() {
+	p := s.env.ProjectName
+	l := "test-signv1"
+	exists, err := s.client.CheckProjectExist(p)
+	s.Require().NoError(err)
+	if !exists {
+		_, err = s.client.CreateProject(p, "")
+		s.Require().NoError(err)
+	}
+	exists, err = s.client.CheckLogstoreExist(p, l)
+	s.Require().NoError(err)
+	if !exists {
+		err = s.client.CreateLogStore(p, l, 7, 1, false, 64)
+		s.Require().NoError(err)
+	}
+	_, err = s.client.GetLogStore(p, l)
+	s.Require().NoError(err)
+	time.Sleep(time.Second * 5)
+	t := uint32(time.Now().Unix())
+	err = s.client.PutLogs(p, l, &LogGroup{
+		Logs: []*Log{
+			{
+				Time: &t,
+				Contents: []*LogContent{
+					{
+						Key:   proto.String("test"),
+						Value: proto.String("test"),
+					},
+				},
+			},
+		},
+	})
+	s.Require().NoError(err)
+	cursor, err := s.client.GetCursor(p, l, 0, "end")
+	s.Require().NoError(err)
+	cursorTime, err := s.client.GetCursorTime(p, l, 0, cursor)
+	s.Require().NoError(err)
+	s.Greater(cursorTime.Unix(), int64(0))
+	s.client.DeleteLogStore(p, l)
+}
+
 func TestSignerV1Suite(t *testing.T) {
 	suite.Run(t, new(SignerV1Suite))
 }
diff --git a/signature_v4_test.go b/signature_v4_test.go
index d80d4706..bbd3a31e 100644
--- a/signature_v4_test.go
+++ b/signature_v4_test.go
@@ -141,13 +141,13 @@ func (s *SignerV4Suite) TestSignV4Case6() {
 func (s *SignerV4Suite) TestSignV1Case1() {
 	headers := map[string]string{
 		"x-log-apiversion":      "0.6.0",
-		"x-log-signaturemethod": "hmac-sha1",
+		"x-log-signaturemethod": "hmac-sha256",
 		"x-log-bodyrawsize":     "0",
 		"Date":                  "Mon, 3 Jan 2010 08:33:47 GMT",
 	}
 	mockAKID := "mockAccessKeyID"
 	mockAKSec := "mockAccessKeySecret"
-	expSign := "Rwm6cTKzoti4HWoe+GKcb6Kv07E="
+	expSign := "hNNf3Nv33R//Gxu++a0anEi7d5xbS5gapaPd/6eIxTk="
 	expAuth := fmt.Sprintf("SLS %s:%s", mockAKID, expSign)
 
 	v1 := SignerV1{accessKeyID: mockAKID, accessKeySecret: mockAKSec}
@@ -176,7 +176,7 @@ func (s *SignerV4Suite) TestSignV1Case2() {
 	}
 	mockAKID := "mockAccessKeyID"
 	mockAKSec := "mockAccessKeySecret"
-	expSign := "87xQWqFaOSewqRIma8kPjGYlXHc="
+	expSign := "GGHiEECbn3P3QaMh2fLMs94z95xDVeQmhULhe54o0S4="
 	expAuth := fmt.Sprintf("SLS %s:%s", mockAKID, expSign)
 	v1 := SignerV1{
 		accessKeyID:     mockAKID,