diff --git a/common/protocol/quic/qtls_go118.go b/common/protocol/quic/qtls_go118.go
deleted file mode 100644
index 429037dfc..000000000
--- a/common/protocol/quic/qtls_go118.go
+++ /dev/null
@@ -1,18 +0,0 @@
-//go:build go1.18 && !go1.19
-
-package quic
-
-import (
-	"crypto/cipher"
-
-	"github.com/quic-go/qtls-go1-18"
-)
-
-type (
-	// A CipherSuiteTLS13 is a cipher suite for TLS 1.3
-	CipherSuiteTLS13 = qtls.CipherSuiteTLS13
-)
-
-func AEADAESGCMTLS13(key, fixedNonce []byte) cipher.AEAD {
-	return qtls.AEADAESGCMTLS13(key, fixedNonce)
-}
diff --git a/go.mod b/go.mod
index 91614fe10..e5da8497f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/v2fly/v2ray-core/v5
 
-go 1.18
+go 1.19
 
 require (
 	github.com/adrg/xdg v0.4.0
@@ -16,7 +16,6 @@ require (
 	github.com/mustafaturan/bus v1.0.2
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.6.2
-	github.com/quic-go/qtls-go1-18 v0.2.0
 	github.com/quic-go/qtls-go1-19 v0.2.1
 	github.com/quic-go/qtls-go1-20 v0.1.1
 	github.com/quic-go/quic-go v0.33.0
diff --git a/go.sum b/go.sum
index 6548847d2..57e15fb46 100644
--- a/go.sum
+++ b/go.sum
@@ -253,8 +253,6 @@ github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y8
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
-github.com/quic-go/qtls-go1-18 v0.2.0 h1:5ViXqBZ90wpUcZS0ge79rf029yx0dYB0McyPJwqqj7U=
-github.com/quic-go/qtls-go1-18 v0.2.0/go.mod h1:moGulGHK7o6O8lSPSZNoOwcLvJKJ85vVNc7oJFD65bc=
 github.com/quic-go/qtls-go1-19 v0.2.1 h1:aJcKNMkH5ASEJB9FXNeZCyTEIHU1J7MmHyz1Q1TSG1A=
 github.com/quic-go/qtls-go1-19 v0.2.1/go.mod h1:ySOI96ew8lnoKPtSqx2BlI5wCpUVPT05RMAlajtnyOI=
 github.com/quic-go/qtls-go1-20 v0.1.1 h1:KbChDlg82d3IHqaj2bn6GfKRj84Per2VGf5XV3wSwQk=