diff --git a/auth.go b/auth.go
index 59b49850..a7cb0128 100644
--- a/auth.go
+++ b/auth.go
@@ -55,8 +55,8 @@ func NewAuthServer(user string, pass string, methods []AuthMethod) *AuthServer {
 }
 
 // GenerateHeader generates the WWW-Authenticate header needed by a client to log in.
-func (as *AuthServer) GenerateHeader() []string {
-	var ret []string
+func (as *AuthServer) GenerateHeader() HeaderValue {
+	var ret HeaderValue
 	for _, m := range as.methods {
 		switch m {
 		case Basic:
@@ -65,7 +65,7 @@ func (as *AuthServer) GenerateHeader() []string {
 				Values: map[string]string{
 					"realm": as.realm,
 				},
-			}).Write())
+			}).Write()...)
 
 		case Digest:
 			ret = append(ret, (&HeaderAuth{
@@ -74,7 +74,7 @@ func (as *AuthServer) GenerateHeader() []string {
 					"realm": as.realm,
 					"nonce": as.nonce,
 				},
-			}).Write())
+			}).Write()...)
 		}
 	}
 	return ret
@@ -82,18 +82,18 @@ func (as *AuthServer) GenerateHeader() []string {
 
 // ValidateHeader validates the Authorization header sent by a client after receiving the
 // WWW-Authenticate header provided by GenerateHeader().
-func (as *AuthServer) ValidateHeader(header []string, method Method, ur *url.URL) error {
-	if len(header) == 0 {
+func (as *AuthServer) ValidateHeader(v HeaderValue, method Method, ur *url.URL) error {
+	if len(v) == 0 {
 		return fmt.Errorf("authorization header not provided")
 	}
-	if len(header) > 1 {
+	if len(v) > 1 {
 		return fmt.Errorf("authorization header provided multiple times")
 	}
 
-	head := header[0]
+	v0 := v[0]
 
-	if strings.HasPrefix(head, "Basic ") {
-		inResponse := head[len("Basic "):]
+	if strings.HasPrefix(v0, "Basic ") {
+		inResponse := v0[len("Basic "):]
 
 		response := base64.StdEncoding.EncodeToString([]byte(as.user + ":" + as.pass))
 
@@ -101,8 +101,8 @@ func (as *AuthServer) ValidateHeader(header []string, method Method, ur *url.URL
 			return fmt.Errorf("wrong response")
 		}
 
-	} else if strings.HasPrefix(head, "Digest ") {
-		auth, err := ReadHeaderAuth(head)
+	} else if strings.HasPrefix(v0, "Digest ") {
+		auth, err := ReadHeaderAuth(HeaderValue{v0})
 		if err != nil {
 			return err
 		}
@@ -191,18 +191,17 @@ type authClient struct {
 
 // newAuthClient allocates an authClient.
 // header is the WWW-Authenticate header provided by the server.
-func newAuthClient(header []string, user string, pass string) (*authClient, error) {
+func newAuthClient(v HeaderValue, user string, pass string) (*authClient, error) {
 	// prefer digest
-	headerAuthDigest := func() string {
-		for _, v := range header {
-			if strings.HasPrefix(v, "Digest ") {
-				return v
+	if headerAuthDigest := func() string {
+		for _, vi := range v {
+			if strings.HasPrefix(vi, "Digest ") {
+				return vi
 			}
 		}
 		return ""
-	}()
-	if headerAuthDigest != "" {
-		auth, err := ReadHeaderAuth(headerAuthDigest)
+	}(); headerAuthDigest != "" {
+		auth, err := ReadHeaderAuth(HeaderValue{headerAuthDigest})
 		if err != nil {
 			return nil, err
 		}
@@ -226,16 +225,15 @@ func newAuthClient(header []string, user string, pass string) (*authClient, erro
 		}, nil
 	}
 
-	headerAuthBasic := func() string {
-		for _, v := range header {
-			if strings.HasPrefix(v, "Basic ") {
-				return v
+	if headerAuthBasic := func() string {
+		for _, vi := range v {
+			if strings.HasPrefix(vi, "Basic ") {
+				return vi
 			}
 		}
 		return ""
-	}()
-	if headerAuthBasic != "" {
-		auth, err := ReadHeaderAuth(headerAuthBasic)
+	}(); headerAuthBasic != "" {
+		auth, err := ReadHeaderAuth(HeaderValue{headerAuthBasic})
 		if err != nil {
 			return nil, err
 		}
@@ -258,18 +256,18 @@ func newAuthClient(header []string, user string, pass string) (*authClient, erro
 
 // GenerateHeader generates an Authorization Header that allows to authenticate a request with
 // the given method and url.
-func (ac *authClient) GenerateHeader(method Method, ur *url.URL) []string {
+func (ac *authClient) GenerateHeader(method Method, ur *url.URL) HeaderValue {
 	switch ac.method {
 	case Basic:
 		response := base64.StdEncoding.EncodeToString([]byte(ac.user + ":" + ac.pass))
 
-		return []string{"Basic " + response}
+		return HeaderValue{"Basic " + response}
 
 	case Digest:
 		response := md5Hex(md5Hex(ac.user+":"+ac.realm+":"+ac.pass) + ":" +
 			ac.nonce + ":" + md5Hex(string(method)+":"+ur.String()))
 
-		return []string{(&HeaderAuth{
+		return (&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
 				"username": ac.user,
@@ -278,7 +276,7 @@ func (ac *authClient) GenerateHeader(method Method, ur *url.URL) []string {
 				"uri":      ur.String(),
 				"response": response,
 			},
-		}).Write()}
+		}).Write()
 	}
 
 	return nil
diff --git a/conn-client.go b/conn-client.go
index c455e0c3..0649fca6 100644
--- a/conn-client.go
+++ b/conn-client.go
@@ -112,7 +112,7 @@ func (c *ConnClient) Do(req *Request) (*Response, error) {
 
 	// insert session
 	if c.session != "" {
-		req.Header["Session"] = []string{c.session}
+		req.Header["Session"] = HeaderValue{c.session}
 	}
 
 	// insert auth
@@ -129,7 +129,7 @@ func (c *ConnClient) Do(req *Request) (*Response, error) {
 
 	// insert cseq
 	c.curCSeq += 1
-	req.Header["CSeq"] = []string{strconv.FormatInt(int64(c.curCSeq), 10)}
+	req.Header["CSeq"] = HeaderValue{strconv.FormatInt(int64(c.curCSeq), 10)}
 
 	c.conf.Conn.SetWriteDeadline(time.Now().Add(c.conf.WriteTimeout))
 	err := req.write(c.bw)
@@ -148,8 +148,8 @@ func (c *ConnClient) Do(req *Request) (*Response, error) {
 	}
 
 	// get session from response
-	if sxRaw, ok := res.Header["Session"]; ok && len(sxRaw) == 1 {
-		sx, err := ReadHeaderSession(sxRaw[0])
+	if v, ok := res.Header["Session"]; ok {
+		sx, err := ReadHeaderSession(v)
 		if err != nil {
 			return nil, fmt.Errorf("unable to parse session header: %s", err)
 		}
@@ -301,7 +301,7 @@ func (c *ConnClient) setup(u *url.URL, media *sdp.MediaDescription, transport []
 		Method: SETUP,
 		Url:    u,
 		Header: Header{
-			"Transport": []string{strings.Join(transport, ";")},
+			"Transport": HeaderValue{strings.Join(transport, ";")},
 		},
 	})
 	if err != nil {
@@ -329,12 +329,11 @@ func (c *ConnClient) SetupUdp(u *url.URL, track *Track, rtpPort int,
 		return 0, 0, nil, err
 	}
 
-	tsRaw, ok := res.Header["Transport"]
-	if !ok || len(tsRaw) != 1 {
-		return 0, 0, nil, fmt.Errorf("SETUP: transport header not provided")
+	th, err := ReadHeaderTransport(res.Header["Transport"])
+	if err != nil {
+		return 0, 0, nil, fmt.Errorf("SETUP: transport header: %s", err)
 	}
 
-	th := ReadHeaderTransport(tsRaw[0])
 	rtpServerPort, rtcpServerPort := th.GetPorts("server_port")
 	if rtpServerPort == 0 {
 		return 0, 0, nil, fmt.Errorf("SETUP: server ports not provided")
@@ -357,15 +356,14 @@ func (c *ConnClient) SetupTcp(u *url.URL, track *Track) (*Response, error) {
 		return nil, err
 	}
 
-	tsRaw, ok := res.Header["Transport"]
-	if !ok || len(tsRaw) != 1 {
-		return nil, fmt.Errorf("SETUP: transport header not provided")
+	th, err := ReadHeaderTransport(res.Header["Transport"])
+	if err != nil {
+		return nil, fmt.Errorf("SETUP: transport header: %s", err)
 	}
-	th := ReadHeaderTransport(tsRaw[0])
 
-	_, ok = th[interleaved]
+	_, ok := th[interleaved]
 	if !ok {
-		return nil, fmt.Errorf("SETUP: transport header does not have %s (%s)", interleaved, tsRaw[0])
+		return nil, fmt.Errorf("SETUP: transport header does not have %s (%s)", interleaved, res.Header["Transport"])
 	}
 
 	return res, nil
diff --git a/header-auth.go b/header-auth.go
index e030af2a..652ae349 100644
--- a/header-auth.go
+++ b/header-auth.go
@@ -16,23 +16,33 @@ type HeaderAuth struct {
 var regHeaderAuthKeyValue = regexp.MustCompile("^([a-z]+)=(\"(.*?)\"|([a-zA-Z0-9]+))(, *|$)")
 
 // ReadHeaderAuth parses an Authenticate or a WWW-Authenticate header.
-func ReadHeaderAuth(in string) (*HeaderAuth, error) {
+func ReadHeaderAuth(v HeaderValue) (*HeaderAuth, error) {
+	if len(v) == 0 {
+		return nil, fmt.Errorf("value not provided")
+	}
+
+	if len(v) > 1 {
+		return nil, fmt.Errorf("value provided multiple times (%v)", v)
+	}
+
 	ha := &HeaderAuth{
 		Values: make(map[string]string),
 	}
 
-	i := strings.IndexByte(in, ' ')
-	if i < 0 {
-		return nil, fmt.Errorf("unable to find prefix (%s)", in)
-	}
-	ha.Prefix, in = in[:i], in[i+1:]
+	v0 := v[0]
 
-	for len(in) > 0 {
-		m := regHeaderAuthKeyValue.FindStringSubmatch(in)
+	i := strings.IndexByte(v[0], ' ')
+	if i < 0 {
+		return nil, fmt.Errorf("unable to find prefix (%s)", v0)
+	}
+	ha.Prefix, v0 = v0[:i], v0[i+1:]
+
+	for len(v0) > 0 {
+		m := regHeaderAuthKeyValue.FindStringSubmatch(v0)
 		if m == nil {
-			return nil, fmt.Errorf("unable to parse key-value (%s)", in)
+			return nil, fmt.Errorf("unable to parse key-value (%s)", v0)
 		}
-		in = in[len(m[0]):]
+		v0 = v0[len(m[0]):]
 
 		m[2] = strings.TrimPrefix(m[2], "\"")
 		m[2] = strings.TrimSuffix(m[2], "\"")
@@ -43,7 +53,7 @@ func ReadHeaderAuth(in string) (*HeaderAuth, error) {
 }
 
 // Write encodes an Authenticate or a WWW-Authenticate header.
-func (ha *HeaderAuth) Write() string {
+func (ha *HeaderAuth) Write() HeaderValue {
 	ret := ha.Prefix + " "
 
 	// always put realm first, otherwise VLC does not send back the response
@@ -64,5 +74,5 @@ func (ha *HeaderAuth) Write() string {
 	}
 	ret += strings.Join(tmp, ", ")
 
-	return ret
+	return HeaderValue{ret}
 }
diff --git a/header-auth_test.go b/header-auth_test.go
index c7740458..41f46fd3 100644
--- a/header-auth_test.go
+++ b/header-auth_test.go
@@ -8,14 +8,14 @@ import (
 
 var casesHeaderAuth = []struct {
 	name string
-	dec  string
-	enc  string
+	dec  HeaderValue
+	enc  HeaderValue
 	ha   *HeaderAuth
 }{
 	{
 		"basic",
-		`Basic realm="4419b63f5e51"`,
-		`Basic realm="4419b63f5e51"`,
+		HeaderValue{`Basic realm="4419b63f5e51"`},
+		HeaderValue{`Basic realm="4419b63f5e51"`},
 		&HeaderAuth{
 			Prefix: "Basic",
 			Values: map[string]string{
@@ -25,8 +25,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest request 1",
-		`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`,
-		`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`,
+		HeaderValue{`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`},
+		HeaderValue{`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
@@ -38,8 +38,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest request 2",
-		`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale=FALSE`,
-		`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`,
+		HeaderValue{`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale=FALSE`},
+		HeaderValue{`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
@@ -51,8 +51,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest request 3",
-		`Digest realm="4419b63f5e51",nonce="133767111917411116111311118211673010032",  stale="FALSE"`,
-		`Digest realm="4419b63f5e51", nonce="133767111917411116111311118211673010032", stale="FALSE"`,
+		HeaderValue{`Digest realm="4419b63f5e51",nonce="133767111917411116111311118211673010032",  stale="FALSE"`},
+		HeaderValue{`Digest realm="4419b63f5e51", nonce="133767111917411116111311118211673010032", stale="FALSE"`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
@@ -64,8 +64,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest response generic",
-		`Digest username="aa", realm="bb", nonce="cc", uri="dd", response="ee"`,
-		`Digest realm="bb", nonce="cc", response="ee", uri="dd", username="aa"`,
+		HeaderValue{`Digest username="aa", realm="bb", nonce="cc", uri="dd", response="ee"`},
+		HeaderValue{`Digest realm="bb", nonce="cc", response="ee", uri="dd", username="aa"`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
@@ -79,8 +79,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest response with empty field",
-		`Digest username="", realm="IPCAM", nonce="5d17cd12b9fa8a85ac5ceef0926ea5a6", uri="rtsp://localhost:8554/mystream", response="c072ae90eb4a27f4cdcb90d62266b2a1"`,
-		`Digest realm="IPCAM", nonce="5d17cd12b9fa8a85ac5ceef0926ea5a6", response="c072ae90eb4a27f4cdcb90d62266b2a1", uri="rtsp://localhost:8554/mystream", username=""`,
+		HeaderValue{`Digest username="", realm="IPCAM", nonce="5d17cd12b9fa8a85ac5ceef0926ea5a6", uri="rtsp://localhost:8554/mystream", response="c072ae90eb4a27f4cdcb90d62266b2a1"`},
+		HeaderValue{`Digest realm="IPCAM", nonce="5d17cd12b9fa8a85ac5ceef0926ea5a6", response="c072ae90eb4a27f4cdcb90d62266b2a1", uri="rtsp://localhost:8554/mystream", username=""`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
@@ -94,8 +94,8 @@ var casesHeaderAuth = []struct {
 	},
 	{
 		"digest response with no spaces and additional fields",
-		`Digest realm="Please log in with a valid username",nonce="752a62306daf32b401a41004555c7663",opaque="",stale=FALSE,algorithm=MD5`,
-		`Digest realm="Please log in with a valid username", algorithm="MD5", nonce="752a62306daf32b401a41004555c7663", opaque="", stale="FALSE"`,
+		HeaderValue{`Digest realm="Please log in with a valid username",nonce="752a62306daf32b401a41004555c7663",opaque="",stale=FALSE,algorithm=MD5`},
+		HeaderValue{`Digest realm="Please log in with a valid username", algorithm="MD5", nonce="752a62306daf32b401a41004555c7663", opaque="", stale="FALSE"`},
 		&HeaderAuth{
 			Prefix: "Digest",
 			Values: map[string]string{
diff --git a/header-session.go b/header-session.go
index ccd3b892..a89827a9 100644
--- a/header-session.go
+++ b/header-session.go
@@ -13,8 +13,16 @@ type HeaderSession struct {
 }
 
 // ReadHeaderSession parses a Session header.
-func ReadHeaderSession(in string) (*HeaderSession, error) {
-	parts := strings.Split(in, ";")
+func ReadHeaderSession(v HeaderValue) (*HeaderSession, error) {
+	if len(v) == 0 {
+		return nil, fmt.Errorf("value not provided")
+	}
+
+	if len(v) > 1 {
+		return nil, fmt.Errorf("value provided multiple times (%v)", v)
+	}
+
+	parts := strings.Split(v[0], ";")
 	if len(parts) == 0 {
 		return nil, fmt.Errorf("invalid value")
 	}
diff --git a/header-session_test.go b/header-session_test.go
index 01d13a90..b8cfd3dd 100644
--- a/header-session_test.go
+++ b/header-session_test.go
@@ -7,20 +7,20 @@ import (
 )
 
 var casesHeaderSession = []struct {
-	name string
-	byts string
-	hs   *HeaderSession
+	name  string
+	value HeaderValue
+	hs    *HeaderSession
 }{
 	{
 		"base",
-		`A3eqwsafq3rFASqew`,
+		HeaderValue{`A3eqwsafq3rFASqew`},
 		&HeaderSession{
 			Session: "A3eqwsafq3rFASqew",
 		},
 	},
 	{
 		"with timeout",
-		`A3eqwsafq3rFASqew;timeout=47`,
+		HeaderValue{`A3eqwsafq3rFASqew;timeout=47`},
 		&HeaderSession{
 			Session: "A3eqwsafq3rFASqew",
 			Timeout: func() *uint {
@@ -31,7 +31,7 @@ var casesHeaderSession = []struct {
 	},
 	{
 		"with timeout and space",
-		`A3eqwsafq3rFASqew; timeout=47`,
+		HeaderValue{`A3eqwsafq3rFASqew; timeout=47`},
 		&HeaderSession{
 			Session: "A3eqwsafq3rFASqew",
 			Timeout: func() *uint {
@@ -45,7 +45,7 @@ var casesHeaderSession = []struct {
 func TestHeaderSession(t *testing.T) {
 	for _, c := range casesHeaderSession {
 		t.Run(c.name, func(t *testing.T) {
-			req, err := ReadHeaderSession(c.byts)
+			req, err := ReadHeaderSession(c.value)
 			require.NoError(t, err)
 			require.Equal(t, c.hs, req)
 		})
diff --git a/header-transport.go b/header-transport.go
index 0b611bea..cfc242fe 100644
--- a/header-transport.go
+++ b/header-transport.go
@@ -1,6 +1,7 @@
 package gortsplib
 
 import (
+	"fmt"
 	"strconv"
 	"strings"
 )
@@ -9,12 +10,21 @@ import (
 type HeaderTransport map[string]struct{}
 
 // ReadHeaderTransport parses a Transport header.
-func ReadHeaderTransport(in string) HeaderTransport {
+func ReadHeaderTransport(v HeaderValue) (HeaderTransport, error) {
+	if len(v) == 0 {
+		return nil, fmt.Errorf("value not provided")
+	}
+
+	if len(v) > 1 {
+		return nil, fmt.Errorf("value provided multiple times (%v)", v)
+	}
+
 	ht := make(map[string]struct{})
-	for _, t := range strings.Split(in, ";") {
+	for _, t := range strings.Split(v[0], ";") {
 		ht[t] = struct{}{}
 	}
-	return ht
+
+	return ht, nil
 }
 
 // GetValue gets a value from the header.
diff --git a/header.go b/header.go
index 2a9a1843..945ec9a5 100644
--- a/header.go
+++ b/header.go
@@ -28,8 +28,11 @@ func headerKeyNormalize(in string) string {
 	return http.CanonicalHeaderKey(in)
 }
 
+// HeaderValue is an header value.
+type HeaderValue []string
+
 // Header is a RTSP reader, present in both Requests and Responses.
-type Header map[string][]string
+type Header map[string]HeaderValue
 
 func headerRead(rb *bufio.Reader) (Header, error) {
 	h := make(Header)
diff --git a/header_test.go b/header_test.go
index 77a6afd2..5467c9a6 100644
--- a/header_test.go
+++ b/header_test.go
@@ -23,8 +23,8 @@ var casesHeader = []struct {
 			"Require: implicit-play\r\n" +
 			"\r\n"),
 		Header{
-			"Require":       []string{"implicit-play"},
-			"Proxy-Require": []string{"gzipped-messages"},
+			"Require":       HeaderValue{"implicit-play"},
+			"Proxy-Require": HeaderValue{"gzipped-messages"},
 		},
 	},
 	{
@@ -36,7 +36,7 @@ var casesHeader = []struct {
 			"WWW-Authenticate: Basic realm=\"4419b63f5e51\"\r\n" +
 			"\r\n"),
 		Header{
-			"WWW-Authenticate": []string{
+			"WWW-Authenticate": HeaderValue{
 				`Digest realm="4419b63f5e51", nonce="8b84a3b789283a8bea8da7fa7d41f08b", stale="FALSE"`,
 				`Basic realm="4419b63f5e51"`,
 			},
@@ -49,7 +49,7 @@ var casesHeader = []struct {
 		[]byte("CSeq: 2\r\n" +
 			"\r\n"),
 		Header{
-			"CSeq": []string{"2"},
+			"CSeq": HeaderValue{"2"},
 		},
 	},
 	{
@@ -59,7 +59,7 @@ var casesHeader = []struct {
 		[]byte("CSeq: 2\r\n" +
 			"\r\n"),
 		Header{
-			"CSeq": []string{"2"},
+			"CSeq": HeaderValue{"2"},
 		},
 	},
 	{
@@ -71,8 +71,8 @@ var casesHeader = []struct {
 			"Content-Type: testing\r\n" +
 			"\r\n"),
 		Header{
-			"Content-Length": []string{"value"},
-			"Content-Type":   []string{"testing"},
+			"Content-Length": HeaderValue{"value"},
+			"Content-Type":   HeaderValue{"testing"},
 		},
 	},
 	{
@@ -84,8 +84,8 @@ var casesHeader = []struct {
 			"WWW-Authenticate: value\r\n" +
 			"\r\n"),
 		Header{
-			"CSeq":             []string{"value"},
-			"WWW-Authenticate": []string{"value"},
+			"CSeq":             HeaderValue{"value"},
+			"WWW-Authenticate": HeaderValue{"value"},
 		},
 	},
 }
diff --git a/request_test.go b/request_test.go
index 95dc55b3..923be4f4 100644
--- a/request_test.go
+++ b/request_test.go
@@ -25,9 +25,9 @@ var casesRequest = []struct {
 			Method: "OPTIONS",
 			Url:    &url.URL{Scheme: "rtsp", Host: "example.com", Path: "/media.mp4"},
 			Header: Header{
-				"CSeq":          []string{"1"},
-				"Require":       []string{"implicit-play"},
-				"Proxy-Require": []string{"gzipped-messages"},
+				"CSeq":          HeaderValue{"1"},
+				"Require":       HeaderValue{"implicit-play"},
+				"Proxy-Require": HeaderValue{"gzipped-messages"},
 			},
 		},
 	},
@@ -40,7 +40,7 @@ var casesRequest = []struct {
 			Method: "DESCRIBE",
 			Url:    &url.URL{Scheme: "rtsp", Host: "example.com", Path: "/media.mp4"},
 			Header: Header{
-				"CSeq": []string{"2"},
+				"CSeq": HeaderValue{"2"},
 			},
 		},
 	},
@@ -68,11 +68,11 @@ var casesRequest = []struct {
 			Method: "ANNOUNCE",
 			Url:    &url.URL{Scheme: "rtsp", Host: "example.com", Path: "/media.mp4"},
 			Header: Header{
-				"CSeq":           []string{"7"},
-				"Date":           []string{"23 Jan 1997 15:35:06 GMT"},
-				"Session":        []string{"12345678"},
-				"Content-Type":   []string{"application/sdp"},
-				"Content-Length": []string{"306"},
+				"CSeq":           HeaderValue{"7"},
+				"Date":           HeaderValue{"23 Jan 1997 15:35:06 GMT"},
+				"Session":        HeaderValue{"12345678"},
+				"Content-Type":   HeaderValue{"application/sdp"},
+				"Content-Length": HeaderValue{"306"},
 			},
 			Content: []byte("v=0\n" +
 				"o=mhandley 2890844526 2890845468 IN IP4 126.16.64.4\n" +
@@ -102,10 +102,10 @@ var casesRequest = []struct {
 			Method: "GET_PARAMETER",
 			Url:    &url.URL{Scheme: "rtsp", Host: "example.com", Path: "/media.mp4"},
 			Header: Header{
-				"CSeq":           []string{"9"},
-				"Content-Type":   []string{"text/parameters"},
-				"Session":        []string{"12345678"},
-				"Content-Length": []string{"24"},
+				"CSeq":           HeaderValue{"9"},
+				"Content-Type":   HeaderValue{"text/parameters"},
+				"Session":        HeaderValue{"12345678"},
+				"Content-Length": HeaderValue{"24"},
 			},
 			Content: []byte("packets_received\n" +
 				"jitter\n",
diff --git a/response.go b/response.go
index 53199289..60bead40 100644
--- a/response.go
+++ b/response.go
@@ -198,7 +198,7 @@ func (res *Response) write(bw *bufio.Writer) error {
 	}
 
 	if len(res.Content) != 0 {
-		res.Header["Content-Length"] = []string{strconv.FormatInt(int64(len(res.Content)), 10)}
+		res.Header["Content-Length"] = HeaderValue{strconv.FormatInt(int64(len(res.Content)), 10)}
 	}
 
 	err = res.Header.write(bw)
diff --git a/response_test.go b/response_test.go
index 5eafe6e7..dc184063 100644
--- a/response_test.go
+++ b/response_test.go
@@ -24,8 +24,8 @@ var casesResponse = []struct {
 			StatusCode:    StatusOK,
 			StatusMessage: "OK",
 			Header: Header{
-				"CSeq":   []string{"1"},
-				"Public": []string{"DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE"},
+				"CSeq":   HeaderValue{"1"},
+				"Public": HeaderValue{"DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE"},
 			},
 		},
 	},
@@ -43,13 +43,13 @@ var casesResponse = []struct {
 			StatusCode:    StatusOK,
 			StatusMessage: "OK",
 			Header: Header{
-				"CSeq":    []string{"2"},
-				"Session": []string{"645252166"},
-				"WWW-Authenticate": []string{
+				"CSeq":    HeaderValue{"2"},
+				"Session": HeaderValue{"645252166"},
+				"WWW-Authenticate": HeaderValue{
 					"Digest realm=\"4419b63f5e51\", nonce=\"8b84a3b789283a8bea8da7fa7d41f08b\", stale=\"FALSE\"",
 					"Basic realm=\"4419b63f5e51\"",
 				},
-				"Date": []string{"Sat, Aug 16 2014 02:22:28 GMT"},
+				"Date": HeaderValue{"Sat, Aug 16 2014 02:22:28 GMT"},
 			},
 		},
 	},
@@ -82,10 +82,10 @@ var casesResponse = []struct {
 			StatusCode:    200,
 			StatusMessage: "OK",
 			Header: Header{
-				"Content-Base":   []string{"rtsp://example.com/media.mp4"},
-				"Content-Length": []string{"444"},
-				"Content-Type":   []string{"application/sdp"},
-				"CSeq":           []string{"2"},
+				"Content-Base":   HeaderValue{"rtsp://example.com/media.mp4"},
+				"Content-Length": HeaderValue{"444"},
+				"Content-Type":   HeaderValue{"application/sdp"},
+				"CSeq":           HeaderValue{"2"},
 			},
 			Content: []byte("m=video 0 RTP/AVP 96\n" +
 				"a=control:streamid=0\n" +
@@ -135,13 +135,13 @@ func TestResponseWriteStatusAutofill(t *testing.T) {
 	res := &Response{
 		StatusCode: StatusMethodNotAllowed,
 		Header: Header{
-			"CSeq":    []string{"2"},
-			"Session": []string{"645252166"},
-			"WWW-Authenticate": []string{
+			"CSeq":    HeaderValue{"2"},
+			"Session": HeaderValue{"645252166"},
+			"WWW-Authenticate": HeaderValue{
 				"Digest realm=\"4419b63f5e51\", nonce=\"8b84a3b789283a8bea8da7fa7d41f08b\", stale=\"FALSE\"",
 				"Basic realm=\"4419b63f5e51\"",
 			},
-			"Date": []string{"Sat, Aug 16 2014 02:22:28 GMT"},
+			"Date": HeaderValue{"Sat, Aug 16 2014 02:22:28 GMT"},
 		},
 	}
 	byts := []byte("RTSP/1.0 405 Method Not Allowed\r\n" +