diff --git a/crypto_stream.go b/crypto_stream.go
index 8dbad163e..7589cdc0d 100644
--- a/crypto_stream.go
+++ b/crypto_stream.go
@@ -15,6 +15,8 @@ const (
 	TagCHLO Tag = 'C' + 'H'<<8 + 'L'<<16 + 'O'<<24
 	// TagREJ is a server hello rejection
 	TagREJ Tag = 'R' + 'E'<<8 + 'J'<<16
+	// TagSCFG is a server config
+	TagSCFG Tag = 'S' + 'C'<<8 + 'F'<<16 + 'G'<<24
 
 	// TagPAD is padding
 	TagPAD Tag = 'P' + 'A'<<8 + 'D'<<16
@@ -49,14 +51,25 @@ const (
 	// TagSFCW is the initial stream flow control receive window.
 	TagSFCW Tag = 'S' + 'F'<<8 + 'C'<<16 + 'W'<<24
 
-	// TagSCFG is the server config
-	TagSCFG Tag = 'S' + 'C'<<8 + 'F'<<16 + 'G'<<24
 	// TagSTK is the source-address token
 	TagSTK Tag = 'S' + 'T'<<8 + 'K'<<16
 	// TagSNO is the server nonce
 	TagSNO Tag = 'S' + 'N'<<8 + 'O'<<16
 	// TagPROF is the server proof
 	TagPROF Tag = 'P' + 'R'<<8 + 'O'<<16 + 'F'<<24
+
+	// TagSCID is the server config ID
+	TagSCID Tag = 'S' + 'C'<<8 + 'I'<<16 + 'D'<<24
+	// TagKEXS is the list of key exchange algos
+	TagKEXS Tag = 'K' + 'E'<<8 + 'X'<<16 + 'S'<<24
+	// TagAEAD is the list of AEAD algos
+	TagAEAD Tag = 'A' + 'E'<<8 + 'A'<<16 + 'D'<<24
+	// TagPUBS is the public value for the KEX
+	TagPUBS Tag = 'P' + 'U'<<8 + 'B'<<16 + 'S'<<24
+	// TagORBT is the client orbit
+	TagORBT Tag = 'O' + 'R'<<8 + 'B'<<16 + 'T'<<24
+	// TagEXPY is the server config expiry
+	TagEXPY Tag = 'E' + 'X'<<8 + 'P'<<16 + 'Y'<<24
 )
 
 var (
diff --git a/example/main.go b/example/main.go
index f31393059..1e3c0567b 100644
--- a/example/main.go
+++ b/example/main.go
@@ -68,4 +68,20 @@ func main() {
 
 	fmt.Printf("Tag: %d\n", messageTag)
 	fmt.Printf("Talking to: %s\n", string(cryptoData[quic.TagUAID]))
+
+	serverConfig := &bytes.Buffer{}
+	quic.WriteCryptoMessage(serverConfig, quic.TagSCFG, map[quic.Tag][]byte{
+		quic.TagSCID: []byte{0xC5, 0x1C, 0x73, 0x6B, 0x8F, 0x48, 0x49, 0xAE, 0xB3, 0x00, 0xA2, 0xD4, 0x4B, 0xA0, 0xCF, 0xDF},
+		quic.TagKEXS: []byte("C255"),
+		quic.TagAEAD: []byte("AESG"),
+		quic.TagPUBS: []byte{},
+		quic.TagORBT: []byte{0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7},
+		quic.TagEXPY: []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
+		quic.TagVER:  []byte("Q030"),
+	})
+
+	serverReply := &bytes.Buffer{}
+	quic.WriteCryptoMessage(serverReply, quic.TagREJ, map[quic.Tag][]byte{
+		quic.TagSCFG: serverConfig.Bytes(),
+	})
 }