diff --git a/go.mod b/go.mod
index 257129c..75cf91b 100644
--- a/go.mod
+++ b/go.mod
@@ -5,5 +5,5 @@ go 1.13
 require (
 	github.com/unistack-org/micro-codec-jsonrpc v0.0.0-20201102222451-ff6a69988bcd
 	github.com/unistack-org/micro-codec-protorpc v0.0.0-20201102222610-3a343898c077
-	github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e
+	github.com/unistack-org/micro/v3 v3.0.2-0.20201117210202-01e64cb0c0f3
 )
diff --git a/go.sum b/go.sum
index 03e5a40..d21906a 100644
--- a/go.sum
+++ b/go.sum
@@ -307,6 +307,8 @@ github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200920135754-1cbd1d2bad83/go.m
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200922103357-4c4fa00a5d94/go.mod h1:aL+8VhSXpx0SuEeXPOWUo5BgS7kyvWYobeXFay90UUM=
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e h1:v27OUgoE2UOyCe6uLksdpG6oErx62nUXWIkTPxS7yIw=
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e/go.mod h1:LFvCXGOgcLIj2k/8eL71TpIpcJBN2SXXAUx8U6dz9Rw=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201117210202-01e64cb0c0f3 h1:knz0mt3Ot/CIXp5dRyb5dAPYtKiWA9PDhazpXX5Iu3o=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201117210202-01e64cb0c0f3/go.mod h1:LYbzHigEudM10AbLZztVSX0Y4JWgj5nKIExil/99h6E=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/vultr/govultr v0.1.4/go.mod h1:9H008Uxr/C4vFNGLqKx232C206GL0PBHzOP0809bGNA=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
diff --git a/http.go b/http.go
index ea2567d..d082932 100644
--- a/http.go
+++ b/http.go
@@ -78,13 +78,7 @@ func (h *httpServer) Handle(handler server.Handler) error {
 }
 
 func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
-	options := server.HandlerOptions{
-		Metadata: make(map[string]map[string]string),
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
+	options := server.NewHandlerOptions(opts...)
 
 	var eps []*registry.Endpoint
 
diff --git a/message.go b/message.go
index bef9371..0da3184 100644
--- a/message.go
+++ b/message.go
@@ -1,12 +1,15 @@
 package http
 
-import "github.com/unistack-org/micro/v3/codec"
+import (
+	"github.com/unistack-org/micro/v3/codec"
+	"github.com/unistack-org/micro/v3/metadata"
+)
 
 type httpMessage struct {
 	topic       string
 	payload     interface{}
 	contentType string
-	header      map[string]string
+	header      metadata.Metadata
 	body        []byte
 	codec       codec.Reader
 }
@@ -23,7 +26,7 @@ func (r *httpMessage) ContentType() string {
 	return r.contentType
 }
 
-func (r *httpMessage) Header() map[string]string {
+func (r *httpMessage) Header() metadata.Metadata {
 	return r.header
 }
 
diff --git a/subscriber.go b/subscriber.go
index 5aa3790..7abaf81 100644
--- a/subscriber.go
+++ b/subscriber.go
@@ -38,9 +38,6 @@ type httpSubscriber struct {
 
 func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
 	options := server.NewSubscriberOptions(opts...)
-	for _, o := range opts {
-		o(&options)
-	}
 
 	var endpoints []*registry.Endpoint
 	var handlers []*handler
@@ -59,15 +56,14 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 		}
 
 		handlers = append(handlers, h)
-
-		endpoints = append(endpoints, &registry.Endpoint{
-			Name:    "Func",
-			Request: registry.ExtractSubValue(typ),
-			Metadata: map[string]string{
-				"topic":      topic,
-				"subscriber": "true",
-			},
-		})
+		ep := &registry.Endpoint{
+			Name:     "Func",
+			Request:  registry.ExtractSubValue(typ),
+			Metadata: metadata.New(2),
+		}
+		ep.Metadata.Set("topic", topic)
+		ep.Metadata.Set("subscriber", "true")
+		endpoints = append(endpoints, ep)
 	} else {
 		hdlr := reflect.ValueOf(sub)
 		name := reflect.Indirect(hdlr).Type().Name()
@@ -87,15 +83,14 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 			}
 
 			handlers = append(handlers, h)
-
-			endpoints = append(endpoints, &registry.Endpoint{
-				Name:    name + "." + method.Name,
-				Request: registry.ExtractSubValue(method.Type),
-				Metadata: map[string]string{
-					"topic":      topic,
-					"subscriber": "true",
-				},
-			})
+			ep := &registry.Endpoint{
+				Name:     name + "." + method.Name,
+				Request:  registry.ExtractSubValue(method.Type),
+				Metadata: metadata.New(2),
+			}
+			ep.Metadata.Set("topic", topic)
+			ep.Metadata.Set("subscriber", "true")
+			endpoints = append(endpoints, ep)
 		}
 	}
 
@@ -119,10 +114,7 @@ func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) b
 			return err
 		}
 
-		hdr := make(map[string]string)
-		for k, v := range msg.Header {
-			hdr[k] = v
-		}
+		hdr := metadata.Copy(msg.Header)
 		delete(hdr, "Content-Type")
 		ctx := metadata.NewContext(context.Background(), hdr)