diff --git a/vendor/github.com/lucas-clemente/quic-go/internal/wire/header.go b/vendor/github.com/lucas-clemente/quic-go/internal/wire/header.go
index 03d338abd..36255fdde 100644
--- a/vendor/github.com/lucas-clemente/quic-go/internal/wire/header.go
+++ b/vendor/github.com/lucas-clemente/quic-go/internal/wire/header.go
@@ -28,7 +28,7 @@ type Header struct {
 	Type         protocol.PacketType
 	IsLongHeader bool
 	KeyPhase     int
-	PayloadLen   protocol.ByteCount
+	Length       protocol.ByteCount
 	Token        []byte
 }
 
@@ -72,7 +72,7 @@ func (h *Header) writeLongHeader(b *bytes.Buffer, v protocol.VersionNumber) erro
 		return nil
 	}
 
-	utils.WriteVarInt(b, uint64(h.PayloadLen))
+	utils.WriteVarInt(b, uint64(h.Length))
 	return utils.WriteVarIntPacketNumber(b, h.PacketNumber, h.PacketNumberLen)
 }
 
@@ -88,7 +88,7 @@ func (h *Header) writeShortHeader(b *bytes.Buffer, v protocol.VersionNumber) err
 // GetLength determines the length of the Header.
 func (h *Header) GetLength(v protocol.VersionNumber) protocol.ByteCount {
 	if h.IsLongHeader {
-		length := 1 /* type byte */ + 4 /* version */ + 1 /* conn id len byte */ + protocol.ByteCount(h.DestConnectionID.Len()+h.SrcConnectionID.Len()) + protocol.ByteCount(h.PacketNumberLen) + utils.VarIntLen(uint64(h.PayloadLen))
+		length := 1 /* type byte */ + 4 /* version */ + 1 /* conn id len byte */ + protocol.ByteCount(h.DestConnectionID.Len()+h.SrcConnectionID.Len()) + protocol.ByteCount(h.PacketNumberLen) + utils.VarIntLen(uint64(h.Length))
 		if h.Type == protocol.PacketTypeInitial {
 			length += utils.VarIntLen(uint64(len(h.Token))) + protocol.ByteCount(len(h.Token))
 		}
@@ -118,7 +118,7 @@ func (h *Header) Log(logger utils.Logger) {
 				logger.Debugf("\tLong Header{Type: %s, DestConnectionID: %s, SrcConnectionID: %s, %sOrigDestConnectionID: %s, Version: %s}", h.Type, h.DestConnectionID, h.SrcConnectionID, token, h.OrigDestConnectionID, h.Version)
 				return
 			}
-			logger.Debugf("\tLong Header{Type: %s, DestConnectionID: %s, SrcConnectionID: %s, %sPacketNumber: %#x, PacketNumberLen: %d, PayloadLen: %d, Version: %s}", h.Type, h.DestConnectionID, h.SrcConnectionID, token, h.PacketNumber, h.PacketNumberLen, h.PayloadLen, h.Version)
+			logger.Debugf("\tLong Header{Type: %s, DestConnectionID: %s, SrcConnectionID: %s, %sPacketNumber: %#x, PacketNumberLen: %d, Length: %d, Version: %s}", h.Type, h.DestConnectionID, h.SrcConnectionID, token, h.PacketNumber, h.PacketNumberLen, h.Length, h.Version)
 		}
 	} else {
 		logger.Debugf("\tShort Header{DestConnectionID: %s, PacketNumber: %#x, PacketNumberLen: %d, KeyPhase: %d}", h.DestConnectionID, h.PacketNumber, h.PacketNumberLen, h.KeyPhase)
diff --git a/vendor/github.com/lucas-clemente/quic-go/internal/wire/header_parser.go b/vendor/github.com/lucas-clemente/quic-go/internal/wire/header_parser.go
index f90a50c9e..ce1ec0d95 100644
--- a/vendor/github.com/lucas-clemente/quic-go/internal/wire/header_parser.go
+++ b/vendor/github.com/lucas-clemente/quic-go/internal/wire/header_parser.go
@@ -141,7 +141,7 @@ func (iv *InvariantHeader) parseLongHeader(b *bytes.Reader, sentBy protocol.Pers
 	if err != nil {
 		return nil, err
 	}
-	h.PayloadLen = protocol.ByteCount(pl)
+	h.Length = protocol.ByteCount(pl)
 	pn, pnLen, err := utils.ReadVarIntPacketNumber(b)
 	if err != nil {
 		return nil, err
diff --git a/vendor/github.com/lucas-clemente/quic-go/packet_handler_map.go b/vendor/github.com/lucas-clemente/quic-go/packet_handler_map.go
index 784dced32..a4acb6fd0 100644
--- a/vendor/github.com/lucas-clemente/quic-go/packet_handler_map.go
+++ b/vendor/github.com/lucas-clemente/quic-go/packet_handler_map.go
@@ -216,10 +216,13 @@ func (h *packetHandlerMap) handlePacket(addr net.Addr, data []byte) error {
 	packetData := data[len(data)-r.Len():]
 
 	if hdr.IsLongHeader {
-		if protocol.ByteCount(len(packetData)) < hdr.PayloadLen {
-			return fmt.Errorf("packet payload (%d bytes) is smaller than the expected payload length (%d bytes)", len(packetData), hdr.PayloadLen)
+		if hdr.Length < protocol.ByteCount(hdr.PacketNumberLen) {
+			return fmt.Errorf("packet length (%d bytes) shorter than packet number (%d bytes)", hdr.Length, hdr.PacketNumberLen)
 		}
-		packetData = packetData[:int(hdr.PayloadLen)]
+		if protocol.ByteCount(len(packetData))+protocol.ByteCount(hdr.PacketNumberLen) < hdr.Length {
+			return fmt.Errorf("packet length (%d bytes) is smaller than the expected length (%d bytes)", len(packetData)+int(hdr.PacketNumberLen), hdr.Length)
+		}
+		packetData = packetData[:int(hdr.Length)-int(hdr.PacketNumberLen)]
 		// TODO(#1312): implement parsing of compound packets
 	}
 
diff --git a/vendor/github.com/lucas-clemente/quic-go/packet_packer.go b/vendor/github.com/lucas-clemente/quic-go/packet_packer.go
index 4260aa226..e15103410 100644
--- a/vendor/github.com/lucas-clemente/quic-go/packet_packer.go
+++ b/vendor/github.com/lucas-clemente/quic-go/packet_packer.go
@@ -409,9 +409,9 @@ func (p *packetPacker) getHeader(encLevel protocol.EncryptionLevel) *wire.Header
 	if encLevel != protocol.Encryption1RTT {
 		header.IsLongHeader = true
 		header.SrcConnectionID = p.srcConnID
-		// Set the payload len to maximum size.
+		// Set the length to the maximum packet size.
 		// Since it is encoded as a varint, this guarantees us that the header will end up at most as big as GetLength() returns.
-		header.PayloadLen = p.maxPacketSize
+		header.Length = p.maxPacketSize
 		switch encLevel {
 		case protocol.EncryptionInitial:
 			header.Type = protocol.PacketTypeInitial
@@ -433,20 +433,20 @@ func (p *packetPacker) writeAndSealPacket(
 
 	addPadding := p.perspective == protocol.PerspectiveClient && header.Type == protocol.PacketTypeInitial && !p.hasSentPacket
 
-	// the payload length is only needed for Long Headers
+	// the length is only needed for Long Headers
 	if header.IsLongHeader {
 		if p.perspective == protocol.PerspectiveClient && header.Type == protocol.PacketTypeInitial {
 			header.Token = p.token
 		}
 		if addPadding {
 			headerLen := header.GetLength(p.version)
-			header.PayloadLen = protocol.ByteCount(protocol.MinInitialPacketSize) - headerLen
+			header.Length = protocol.ByteCount(header.PacketNumberLen) + protocol.MinInitialPacketSize - headerLen
 		} else {
-			payloadLen := protocol.ByteCount(sealer.Overhead())
+			length := protocol.ByteCount(sealer.Overhead()) + protocol.ByteCount(header.PacketNumberLen)
 			for _, frame := range frames {
-				payloadLen += frame.Length(p.version)
+				length += frame.Length(p.version)
 			}
-			header.PayloadLen = payloadLen
+			header.Length = length
 		}
 	}