@@ -520,9 +520,9 @@ func (s *containerRouter) wsContainersAttach(ctx context.Context, w http.Respons

 		}()

 		conn := <-wsChan

-		// In case version is higher than 1.26, a binary frame will be sent.

+		// In case version is higher than 1.27, a binary frame will be sent.

 		// See 28176 for details.

-		if versions.GreaterThanOrEqualTo(version, "1.26") {

+		if versions.GreaterThanOrEqualTo(version, "1.27") {

 			conn.PayloadType = websocket.BinaryFrame

 		}

 		return conn, conn, conn, nil

@@ -60,11 +60,11 @@ SKIP:

 		}

 		var nr *types.NetworkResource

-		// Versions < 1.26 fetches all the containers attached to a network

+		// Versions < 1.27 fetches all the containers attached to a network

 		// in a network list api call. It is a heavy weight operation when

-		// run across all the networks. Starting API version 1.26, this detailed

+		// run across all the networks. Starting API version 1.27, this detailed

 		// info is available for network specific GET API (equivalent to inspect)

-		if versions.LessThan(httputils.VersionFromContext(ctx), "1.26") {

+		if versions.LessThan(httputils.VersionFromContext(ctx), "1.27") {

 			nr = n.buildDetailedNetworkResources(nw)

 		} else {

 			nr = n.buildNetworkResource(nw)

@@ -469,7 +469,7 @@ func addServiceFlags(cmd *cobra.Command, opts *serviceOptions) {

 	flags.SetAnnotation(flagTTY, "version", []string{"1.25"})

 	flags.BoolVar(&opts.readOnly, flagReadOnly, false, "Mount the container's root filesystem as read only")

-	flags.SetAnnotation(flagReadOnly, "version", []string{"1.26"})

+	flags.SetAnnotation(flagReadOnly, "version", []string{"1.27"})

 }

 const (

@@ -53,13 +53,11 @@ import (

 	"path/filepath"

 	"strings"

+	"github.com/docker/docker/api"

 	"github.com/docker/go-connections/sockets"

 	"github.com/docker/go-connections/tlsconfig"

 )

-// DefaultVersion is the version of the current stable API

-const DefaultVersion string = "1.26"

-

 // Client is the API client that performs all operations

 // against a docker server.

 type Client struct {

@@ -115,7 +113,7 @@ func NewEnvClient() (*Client, error) {

 	}

 	version := os.Getenv("DOCKER_API_VERSION")

 	if version == "" {

-		version = DefaultVersion

+		version = api.DefaultVersion

 	}

 	cli, err := NewClient(host, version, client, nil)

@@ -11,6 +11,7 @@ import (

 	"strings"

 	"testing"

+	"github.com/docker/docker/api"

 	"github.com/docker/docker/api/types"

 	"golang.org/x/net/context"

 )

@@ -26,7 +27,7 @@ func TestNewEnvClient(t *testing.T) {

 	}{

 		{

 			envs:            map[string]string{},

-			expectedVersion: DefaultVersion,

+			expectedVersion: api.DefaultVersion,

 		},

 		{

 			envs: map[string]string{

@@ -38,21 +39,21 @@ func TestNewEnvClient(t *testing.T) {

 			envs: map[string]string{

 				"DOCKER_CERT_PATH": "testdata/",

 			},

-			expectedVersion: DefaultVersion,

+			expectedVersion: api.DefaultVersion,

 		},

 		{

 			envs: map[string]string{

 				"DOCKER_CERT_PATH":  "testdata/",

 				"DOCKER_TLS_VERIFY": "1",

 			},

-			expectedVersion: DefaultVersion,

+			expectedVersion: api.DefaultVersion,

 		},

 		{

 			envs: map[string]string{

 				"DOCKER_CERT_PATH": "testdata/",

 				"DOCKER_HOST":      "https://notaunixsocket",

 			},

-			expectedVersion: DefaultVersion,

+			expectedVersion: api.DefaultVersion,

 		},

 		{

 			envs: map[string]string{

@@ -64,7 +65,7 @@ func TestNewEnvClient(t *testing.T) {

 			envs: map[string]string{

 				"DOCKER_HOST": "invalid://url",

 			},

-			expectedVersion: DefaultVersion,

+			expectedVersion: api.DefaultVersion,

 		},

 		{

 			envs: map[string]string{

@@ -262,8 +263,8 @@ func TestNewEnvClientSetsDefaultVersion(t *testing.T) {

 	if err != nil {

 		t.Fatal(err)

 	}

-	if client.version != DefaultVersion {

-		t.Fatalf("Expected %s, got %s", DefaultVersion, client.version)

+	if client.version != api.DefaultVersion {

+		t.Fatalf("Expected %s, got %s", api.DefaultVersion, client.version)

 	}

 	expected := "1.22"