@@ -3,7 +3,7 @@ module .com/cloudflare/odoh-go
 go 1.14
 
 require (
-.com/cisco/go-hpke v0.0.0-20210215210317-01c430f1f302
+.com/cisco/go-hpke v0.0.0-20230407100446-246075f83609
 golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 // indirect
 golang.org/x/sys v0.0.0-20210220050731-9a76102bfb43 // indirect
 )

@@ -1,7 +1,5 @@
-git.schwanenlied.me/yawning/x448.git v0.0.0-20170617130356-01b048fb03d6 h1:w8IZgCntCe0RuBJp+dENSMwEBl/k8saTgJ5hPca5IWw=
-git.schwanenlied.me/yawning/x448.git v0.0.0-20170617130356-01b048fb03d6/go.mod h1:wQaGCqEu44ykB17jZHCevrgSVl3KJnwQBObUtrKU4uU=
-.com/cisco/go-hpke v0.0.0-20210215210317-01c430f1f302 h1:unAbn7dpE8eeUfWRaOPl1qTfffhIcCNuKQuECGNGWtk=
-.com/cisco/go-hpke v0.0.0-20210215210317-01c430f1f302/go.mod h1:RSsoIHRMBe69FbF/fIbmWYa3rrC6vuPyC0MbNUpel3Q=
+.com/cisco/go-hpke v0.0.0-20230407100446-246075f83609 h1:+zUH9Y9OFBb59WFBFAQJTK25GGTby/g0DU7P+Pz1WaI=
+.com/cisco/go-hpke v0.0.0-20230407100446-246075f83609/go.mod h1:RJ2C6TWlNvW2BlTT+YcexuRwIyzXter42/IRyb2sOTg=
 .com/cisco/go-tls-syntax v0.0.0-20200617162716-46b0cfb76b9b h1:Ves2turKTX7zruivAcUOQg155xggcbv3suVdbKCBQNM=
 .com/cisco/go-tls-syntax v0.0.0-20200617162716-46b0cfb76b9b/go.mod h1:0AZAV7lYvynZQ5ErHlGMKH+4QYMyNCFd+AiL9MlrCYA=
 .com/cloudflare/circl v1.0.0 h1:64b6pyfCFbYm623ncIkYGNZaOcmIbyd+CjyMi2L9vdI=
@@ -14,14 +12,12 @@ .com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 .com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 .com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a h1:vclmkQCjlDX5OydZ9wv8rBCcS0QyQY66Mpf/7BZbInM=
 golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 h1:/ZScEX8SfEmUGRHs0gxpqteO5nfNW6axyZbBdw9A12g=
 golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190602015325-4c4f7f33c9ed h1:uPxWBzB3+mlnjy9W58qY1j/cjyFjutgw/Vhan2zLy/A=
 golang.org/x/sys v0.0.0-20190602015325-4c4f7f33c9ed/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210220050731-9a76102bfb43 h1:SgQ6LNaYJU0JIuEHv9+s6EbhSCwYeAf5Yvj6lpYlqAE=

@@ -135,12 +135,6 @@ func UnmarshalObliviousDoHConfigContents(buffer []byte) (ObliviousDoHConfigConte
 case 0x0021:
 KemID = hpke.DHKEM_X448
 break
-case 0xFFFE:
-KemID = hpke.KEM_SIKE503
-break
-case 0xFFFF:
-KemID = hpke.KEM_SIKE751
-break
 default:
 return ObliviousDoHConfigContents{}, errors.New(fmt.Sprintf("Unsupported KEMID: %04x", kemId))
 }