diff --git a/alioss.go b/alioss.go
index e420edf..3b18b8f 100644
--- a/alioss.go
+++ b/alioss.go
@@ -16,6 +16,7 @@ package storage
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"io"
 	"net/url"
@@ -23,55 +24,68 @@ import (
 	"strings"
 	"time"
 
-	"github.com/aliyun/aliyun-oss-go-sdk/oss"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
 )
 
 func wrapAliOSSError(err error) error {
 	if err == nil {
 		return nil
 	}
-	var svcErr oss.ServiceError
+	var svcErr *oss.ServiceError
 	if errors.As(err, &svcErr) {
 		return &ErrorWithStatusCode{
 			Err:        err,
 			StatusCode: svcErr.StatusCode,
 		}
 	}
-	var unexpectedErr oss.UnexpectedStatusCodeError
-	if errors.As(err, &unexpectedErr) {
-		return &ErrorWithStatusCode{
-			Err:        err,
-			StatusCode: unexpectedErr.Got(),
-		}
-	}
 	return err
 }
 
 type aliOSSStorage struct {
 	conf   *AliOSSConfig
-	bucket *oss.Bucket
+	client *oss.Client
 }
 
 func NewAliOSS(conf *AliOSSConfig) (Storage, error) {
-	client, err := oss.New(conf.Endpoint, conf.AccessKey, conf.Secret)
-	if err != nil {
-		return nil, err
-	}
-
-	bucket, err := client.Bucket(conf.Bucket)
-	if err != nil {
-		return nil, err
-	}
+	cfg := oss.LoadDefaultConfig().
+		WithCredentialsProvider(credentials.NewStaticCredentialsProvider(conf.AccessKey, conf.Secret)).
+		WithEndpoint(conf.Endpoint).
+		WithRegion(aliOSSRegion(conf))
 
 	return &aliOSSStorage{
 		conf:   conf,
-		bucket: bucket,
+		client: oss.NewClient(cfg),
 	}, nil
 }
 
+// aliOSSRegion returns the region used for request signing. It prefers an
+// explicitly configured region and otherwise derives one from the endpoint,
+// which for public OSS endpoints has the form oss-<region>[-internal].aliyuncs.com.
+func aliOSSRegion(conf *AliOSSConfig) string {
+	if conf.Region != "" {
+		return conf.Region
+	}
+
+	host := strings.TrimPrefix(conf.Endpoint, "https://")
+	host = strings.TrimPrefix(host, "http://")
+	if i := strings.IndexAny(host, "/:"); i >= 0 {
+		host = host[:i]
+	}
+	host = strings.TrimSuffix(host, ".aliyuncs.com")
+	host = strings.TrimPrefix(host, "oss-")
+	host = strings.TrimSuffix(host, "-internal")
+	return host
+}
+
 func (s *aliOSSStorage) UploadData(data []byte, storagePath, contentType string) (string, int64, error) {
-	reader := bytes.NewBuffer(data)
-	if err := s.bucket.PutObject(storagePath, reader, oss.ContentType(contentType)); err != nil {
+	_, err := s.client.PutObject(context.Background(), &oss.PutObjectRequest{
+		Bucket:      oss.Ptr(s.conf.Bucket),
+		Key:         oss.Ptr(storagePath),
+		Body:        bytes.NewReader(data),
+		ContentType: oss.Ptr(contentType),
+	})
+	if err != nil {
 		return "", 0, wrapAliOSSError(err)
 	}
 
@@ -84,7 +98,12 @@ func (s *aliOSSStorage) UploadFile(filepath, storagePath, contentType string) (s
 		return "", 0, err
 	}
 
-	if err = s.bucket.PutObjectFromFile(storagePath, filepath, oss.ContentType(contentType)); err != nil {
+	_, err = s.client.PutObjectFromFile(context.Background(), &oss.PutObjectRequest{
+		Bucket:      oss.Ptr(s.conf.Bucket),
+		Key:         oss.Ptr(storagePath),
+		ContentType: oss.Ptr(contentType),
+	}, filepath)
+	if err != nil {
 		return "", 0, wrapAliOSSError(err)
 	}
 
@@ -100,34 +119,41 @@ func (s *aliOSSStorage) location(storagePath string) string {
 
 func (s *aliOSSStorage) ListObjects(prefix string) ([]string, error) {
 	var objects []string
-	marker := oss.Marker("")
+	var continuationToken *string
 	for {
-		lor, err := s.bucket.ListObjects(oss.Prefix(prefix), marker)
+		lor, err := s.client.ListObjectsV2(context.Background(), &oss.ListObjectsV2Request{
+			Bucket:            oss.Ptr(s.conf.Bucket),
+			Prefix:            oss.Ptr(prefix),
+			ContinuationToken: continuationToken,
+		})
 		if err != nil {
 			return nil, wrapAliOSSError(err)
 		}
 
-		for _, object := range lor.Objects {
-			objects = append(objects, object.Key)
+		for _, object := range lor.Contents {
+			objects = append(objects, oss.ToString(object.Key))
 		}
 
 		if !lor.IsTruncated {
 			break
 		}
-		marker = oss.Marker(lor.NextMarker)
+		continuationToken = lor.NextContinuationToken
 	}
 
 	return objects, nil
 }
 
 func (s *aliOSSStorage) DownloadData(storagePath string) ([]byte, error) {
-	reader, err := s.bucket.GetObject(storagePath)
+	result, err := s.client.GetObject(context.Background(), &oss.GetObjectRequest{
+		Bucket: oss.Ptr(s.conf.Bucket),
+		Key:    oss.Ptr(storagePath),
+	})
 	if err != nil {
 		return nil, wrapAliOSSError(err)
 	}
-	defer reader.Close()
+	defer result.Body.Close()
 
-	data, err := io.ReadAll(reader)
+	data, err := io.ReadAll(result.Body)
 	if err != nil {
 		return nil, wrapAliOSSError(err)
 	}
@@ -135,7 +161,11 @@ func (s *aliOSSStorage) DownloadData(storagePath string) ([]byte, error) {
 }
 
 func (s *aliOSSStorage) DownloadFile(filepath, storagePath string) (int64, error) {
-	if err := s.bucket.GetObjectToFile(storagePath, filepath); err != nil {
+	_, err := s.client.GetObjectToFile(context.Background(), &oss.GetObjectRequest{
+		Bucket: oss.Ptr(s.conf.Bucket),
+		Key:    oss.Ptr(storagePath),
+	}, filepath)
+	if err != nil {
 		return 0, wrapAliOSSError(err)
 	}
 
@@ -148,18 +178,33 @@ func (s *aliOSSStorage) DownloadFile(filepath, storagePath string) (int64, error
 }
 
 func (s *aliOSSStorage) GeneratePresignedUrl(storagePath string, expiration time.Duration) (string, error) {
-	u, err := s.bucket.SignURL(storagePath, oss.HTTPGet, int64(expiration.Seconds()))
+	result, err := s.client.Presign(context.Background(), &oss.GetObjectRequest{
+		Bucket: oss.Ptr(s.conf.Bucket),
+		Key:    oss.Ptr(storagePath),
+	}, oss.PresignExpires(expiration))
 	if err != nil {
 		return "", wrapAliOSSError(err)
 	}
-	return u, nil
+	return result.URL, nil
 }
 
 func (s *aliOSSStorage) DeleteObject(storagePath string) error {
-	return wrapAliOSSError(s.bucket.DeleteObject(storagePath))
+	_, err := s.client.DeleteObject(context.Background(), &oss.DeleteObjectRequest{
+		Bucket: oss.Ptr(s.conf.Bucket),
+		Key:    oss.Ptr(storagePath),
+	})
+	return wrapAliOSSError(err)
 }
 
 func (s *aliOSSStorage) DeleteObjects(storagePaths []string) error {
-	_, err := s.bucket.DeleteObjects(storagePaths)
+	objects := make([]oss.DeleteObject, 0, len(storagePaths))
+	for _, p := range storagePaths {
+		objects = append(objects, oss.DeleteObject{Key: oss.Ptr(p)})
+	}
+
+	_, err := s.client.DeleteMultipleObjects(context.Background(), &oss.DeleteMultipleObjectsRequest{
+		Bucket:  oss.Ptr(s.conf.Bucket),
+		Objects: objects,
+	})
 	return wrapAliOSSError(err)
 }
diff --git a/config.go b/config.go
index 4c719c6..05202b4 100644
--- a/config.go
+++ b/config.go
@@ -27,6 +27,7 @@ type Config interface {
 type AliOSSConfig struct {
 	AccessKey string `yaml:"access_key,omitempty"`
 	Secret    string `yaml:"secret,omitempty"`
+	Region    string `yaml:"region,omitempty"` // optional; derived from endpoint when empty
 	Endpoint  string `yaml:"endpoint,omitempty"`
 	Bucket    string `yaml:"bucket,omitempty"`
 }
diff --git a/error_test.go b/error_test.go
index 9649c94..af833e2 100644
--- a/error_test.go
+++ b/error_test.go
@@ -24,7 +24,7 @@ import (
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
 	smithyhttp "github.com/aws/smithy-go/transport/http"
-	"github.com/aliyun/aliyun-oss-go-sdk/oss"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/api/googleapi"
 )
@@ -173,24 +173,16 @@ func TestWrapAliOSSError(t *testing.T) {
 	})
 
 	t.Run("ServiceError", func(t *testing.T) {
-		inner := oss.ServiceError{StatusCode: 403, Code: "AccessDenied", Message: "denied"}
+		inner := &oss.ServiceError{StatusCode: 403, Code: "AccessDenied", Message: "denied"}
 		requireStatus(t, wrapAliOSSError(inner), 403, inner)
 	})
 
 	t.Run("wrapped ServiceError", func(t *testing.T) {
-		inner := oss.ServiceError{StatusCode: 404, Code: "NoSuchKey"}
+		inner := &oss.ServiceError{StatusCode: 404, Code: "NoSuchKey"}
 		wrapped := fmt.Errorf("get: %w", inner)
 		requireStatus(t, wrapAliOSSError(wrapped), 404, inner)
 	})
 
-	t.Run("UnexpectedStatusCodeError", func(t *testing.T) {
-		// CheckRespCode returns an UnexpectedStatusCodeError when respCode is not in allowed.
-		inner := oss.CheckRespCode(500, []int{200})
-		require.Error(t, inner)
-		var sce *ErrorWithStatusCode
-		require.ErrorAs(t, wrapAliOSSError(inner), &sce)
-		require.Equal(t, 500, sce.StatusCode)
-	})
 
 	t.Run("plain error passes through", func(t *testing.T) {
 		plain := errors.New("eof")
diff --git a/go.mod b/go.mod
index 093fc2a..b2b658b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	cloud.google.com/go/storage v1.62.3
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.22.0
 	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.7.0
-	github.com/aliyun/aliyun-oss-go-sdk v3.0.2+incompatible
+	github.com/aliyun/alibabacloud-oss-go-sdk-v2 v1.5.1
 	github.com/aws/aws-sdk-go-v2 v1.41.12
 	github.com/aws/aws-sdk-go-v2/config v1.32.23
 	github.com/aws/aws-sdk-go-v2/credentials v1.19.22
diff --git a/go.sum b/go.sum
index 7bc4eec..f9dc93b 100644
--- a/go.sum
+++ b/go.sum
@@ -46,8 +46,8 @@ github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0.57.0/go.mod h1:dzcEjy1WJ0Q4u9twNR3LcLhNoYMRCrMCMafpxa0TjPQ=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.57.0 h1:RoO5+d7uCmDqovLrHCr2/BuViUXvdcrNxyNM1pN9dDQ=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.57.0/go.mod h1:YqwkQPrWSC7+byyc1VlKbWLBF5JsW5IoL6xUkemYSXk=
-github.com/aliyun/aliyun-oss-go-sdk v3.0.2+incompatible h1:8psS8a+wKfiLt1iVDX79F7Y6wUM49Lcha2FMXt4UM8g=
-github.com/aliyun/aliyun-oss-go-sdk v3.0.2+incompatible/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
+github.com/aliyun/alibabacloud-oss-go-sdk-v2 v1.5.1 h1:vtiFd0hhPAbyYJjztl0wYUq/PqEGkIlDmVuTIy6zw8Y=
+github.com/aliyun/alibabacloud-oss-go-sdk-v2 v1.5.1/go.mod h1:FTzydeQVmR24FI0D6XWUOMKckjXehM/jgMn1xC+DA9M=
 github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
 github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
 github.com/aws/aws-sdk-go-v2 v1.41.12 h1:DIKX2c31ekm9RA2D9FBj1EWXx++9AdAqRw+e78Tq2Ck=