diff --git a/packet_unpacker.go b/packet_unpacker.go
index 02610111..d31e535f 100644
--- a/packet_unpacker.go
+++ b/packet_unpacker.go
@@ -2,7 +2,6 @@ package quic
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 
 	"github.com/lucas-clemente/quic-go/internal/protocol"
@@ -64,8 +63,6 @@ func (u *packetUnpacker) Unpack(headerBinary []byte, hdr *wire.Header, data []by
 			if err != nil {
 				err = qerr.Error(qerr.InvalidAckData, err.Error())
 			}
-		} else if typeByte&0xe0 == 0x20 {
-			err = errors.New("unimplemented: CONGESTION_FEEDBACK")
 		} else {
 			switch typeByte {
 			case 0x01:
diff --git a/packet_unpacker_test.go b/packet_unpacker_test.go
index 3d4c2219..be8d608d 100644
--- a/packet_unpacker_test.go
+++ b/packet_unpacker_test.go
@@ -92,12 +92,6 @@ var _ = Describe("Packet unpacker", func() {
 		Expect(readFrame.LargestAcked).To(Equal(protocol.PacketNumber(0x13)))
 	})
 
-	It("errors on CONGESTION_FEEDBACK frames", func() {
-		setData([]byte{0x20})
-		_, err := unpacker.Unpack(hdrBin, hdr, data)
-		Expect(err).To(MatchError("unimplemented: CONGESTION_FEEDBACK"))
-	})
-
 	It("handles PADDING frames", func() {
 		setData([]byte{0, 0, 0}) // 3 bytes PADDING
 		packet, err := unpacker.Unpack(hdrBin, hdr, data)