diff --git a/frontend/udp/connection_id.go b/frontend/udp/connection_id.go
index f904419..7272e71 100644
--- a/frontend/udp/connection_id.go
+++ b/frontend/udp/connection_id.go
@@ -7,7 +7,7 @@ import (
 	"net/netip"
 	"time"
 
-	"github.com/minio/sha256-simd"
+	"github.com/zeebo/xxh3"
 
 	"github.com/sot-tech/mochi/pkg/log"
 )
@@ -41,7 +41,9 @@ type ConnectionIDGenerator struct {
 // NewConnectionIDGenerator creates a new connection ID generator.
 func NewConnectionIDGenerator(key string) *ConnectionIDGenerator {
 	return &ConnectionIDGenerator{
-		mac:     hmac.New(sha256.New, []byte(key)),
+		mac: hmac.New(func() hash.Hash {
+			return xxh3.New()
+		}, []byte(key)),
 		connID:  make([]byte, 8),
 		scratch: make([]byte, 32),
 	}
diff --git a/go.mod b/go.mod
index ea3ef88..a4e66c4 100644
--- a/go.mod
+++ b/go.mod
@@ -8,7 +8,7 @@ require (
 	github.com/anacrolix/torrent v1.47.0
 	github.com/go-redis/redis/v8 v8.11.5
 	github.com/golang-jwt/jwt/v4 v4.4.2
-	github.com/jackc/pgx/v5 v5.1.0
+	github.com/jackc/pgx/v5 v5.1.1
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/libp2p/go-reuseport v0.2.0
 	github.com/minio/sha256-simd v1.0.0
@@ -16,6 +16,7 @@ require (
 	github.com/prometheus/client_golang v1.14.0
 	github.com/rs/zerolog v1.28.0
 	github.com/stretchr/testify v1.8.1
+	github.com/zeebo/xxh3 v1.0.2
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -44,7 +45,7 @@ require (
 	github.com/prometheus/common v0.37.0 // indirect
 	github.com/prometheus/procfs v0.8.0 // indirect
 	go.uber.org/atomic v1.10.0 // indirect
-	golang.org/x/crypto v0.2.0 // indirect
+	golang.org/x/crypto v0.3.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
 	golang.org/x/sys v0.2.0 // indirect
 	golang.org/x/text v0.4.0 // indirect
diff --git a/go.sum b/go.sum
index 967678a..8dd0a16 100644
--- a/go.sum
+++ b/go.sum
@@ -215,8 +215,8 @@ github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsI
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b h1:C8S2+VttkHFdOOCXJe+YGfa4vHYwlt4Zx+IVXQ97jYg=
 github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b/go.mod h1:vsD4gTJCa9TptPL8sPkXrLZ+hDuNrZCnj29CQpr4X1E=
-github.com/jackc/pgx/v5 v5.1.0 h1:Z7pLKUb65HK6m18No8GGKT87K34NhIIEHa86rRdjxbU=
-github.com/jackc/pgx/v5 v5.1.0/go.mod h1:Ptn7zmohNsWEsdxRawMzk3gaKma2obW+NWTnKa0S4nk=
+github.com/jackc/pgx/v5 v5.1.1 h1:pZD79K1SYv8wc2HmCQA6VdmRQi7/OtCfv9bM3WAXUYA=
+github.com/jackc/pgx/v5 v5.1.1/go.mod h1:Ptn7zmohNsWEsdxRawMzk3gaKma2obW+NWTnKa0S4nk=
 github.com/jackc/puddle/v2 v2.1.2 h1:0f7vaaXINONKTsxYDn4otOAiJanX/BMeAtY//BXqzlg=
 github.com/jackc/puddle/v2 v2.1.2/go.mod h1:2lpufsF5mRHO6SuZkm0fNYxM6SWHfvyFj62KwNzgels=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
@@ -357,6 +357,9 @@ github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPy
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
+github.com/zeebo/xxh3 v1.0.2 h1:xZmwmqxHZA8AI603jOQ0tMqmBr9lPeFwGg6d+xy9DC0=
+github.com/zeebo/xxh3 v1.0.2/go.mod h1:5NWz9Sef7zIDm2JHfFlcQvNekmcEl9ekUZQQKCYaDcA=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.20.2/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
@@ -372,8 +375,8 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.2.0 h1:BRXPfhNivWL5Yq0BGQ39a2sW6t44aODpfxkWjYdzewE=
-golang.org/x/crypto v0.2.0/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
+golang.org/x/crypto v0.3.0 h1:a06MkbcxBrEFc0w0QIZWXrH/9cCX6KJyWbBOIwAn+7A=
+golang.org/x/crypto v0.3.0/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=