diff --git a/.github/workflows/build-and-push-image.yml b/.github/workflows/build-and-push-image.yml
index 99a9fa9a..9607ba18 100644
--- a/.github/workflows/build-and-push-image.yml
+++ b/.github/workflows/build-and-push-image.yml
@@ -61,7 +61,7 @@ jobs:
           echo "TAG_FRPS_GPR=ghcr.io/fatedier/frps:${{ env.TAG_NAME }}" >> $GITHUB_ENV
 
       - name: Build and push frpc
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./dockerfiles/Dockerfile-for-frpc
@@ -72,7 +72,7 @@ jobs:
             ${{ env.TAG_FRPC_GPR }}
 
       - name: Build and push frps
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./dockerfiles/Dockerfile-for-frps
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index 0aa1c5dd..fb671e0b 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -14,7 +14,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v3
+      - uses: actions/setup-go@v4
         with:
           go-version: '1.20'
       - uses: actions/checkout@v3
@@ -22,7 +22,7 @@ jobs:
         uses: golangci/golangci-lint-action@v3
         with:
           # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
-          version: v1.51
+          version: v1.53
 
           # Optional: golangci-lint command line arguments.
           # args: --issues-exit-code=0
diff --git a/.github/workflows/goreleaser.yml b/.github/workflows/goreleaser.yml
index 484167aa..08bd8316 100644
--- a/.github/workflows/goreleaser.yml
+++ b/.github/workflows/goreleaser.yml
@@ -13,7 +13,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4
         with:
           go-version: '1.20'
           
@@ -22,9 +22,9 @@ jobs:
           ./package.sh
 
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v3
+        uses: goreleaser/goreleaser-action@v4
         with:
           version: latest
-          args: release --rm-dist --release-notes=./Release.md
+          args: release --clean --release-notes=./Release.md
         env:
           GITHUB_TOKEN: ${{ secrets.GPR_TOKEN }}
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index c3642d91..cceb40da 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -18,7 +18,7 @@ jobs:
       pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v6
+    - uses: actions/stale@v8
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         stale-issue-message: 'Issues go stale after 30d of inactivity. Stale issues rot after an additional 7d of inactivity and eventually close.'
diff --git a/client/admin_api.go b/client/admin_api.go
index cba2d919..b1d1885c 100644
--- a/client/admin_api.go
+++ b/client/admin_api.go
@@ -39,12 +39,12 @@ type GeneralResponse struct {
 }
 
 // /healthz
-func (svr *Service) healthz(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) healthz(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(200)
 }
 
 // GET /api/reload
-func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) apiReload(w http.ResponseWriter, _ *http.Request) {
 	res := GeneralResponse{Code: 200}
 
 	log.Info("api request [/api/reload]")
@@ -74,7 +74,7 @@ func (svr *Service) apiReload(w http.ResponseWriter, r *http.Request) {
 }
 
 // POST /api/stop
-func (svr *Service) apiStop(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) apiStop(w http.ResponseWriter, _ *http.Request) {
 	res := GeneralResponse{Code: 200}
 
 	log.Info("api request [/api/stop]")
@@ -124,7 +124,7 @@ func NewProxyStatusResp(status *proxy.WorkingStatus, serverAddr string) ProxySta
 }
 
 // GET /api/status
-func (svr *Service) apiStatus(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) apiStatus(w http.ResponseWriter, _ *http.Request) {
 	var (
 		buf []byte
 		res StatusResp = make(map[string][]ProxyStatusResp)
@@ -153,7 +153,7 @@ func (svr *Service) apiStatus(w http.ResponseWriter, r *http.Request) {
 }
 
 // GET /api/config
-func (svr *Service) apiGetConfig(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) apiGetConfig(w http.ResponseWriter, _ *http.Request) {
 	res := GeneralResponse{Code: 200}
 
 	log.Info("Http get request [/api/config]")
diff --git a/client/control.go b/client/control.go
index 95f84f8c..e344046c 100644
--- a/client/control.go
+++ b/client/control.go
@@ -124,7 +124,7 @@ func (ctl *Control) Run() {
 	go ctl.vm.Run()
 }
 
-func (ctl *Control) HandleReqWorkConn(inMsg *msg.ReqWorkConn) {
+func (ctl *Control) HandleReqWorkConn(_ *msg.ReqWorkConn) {
 	xl := ctl.xl
 	workConn, err := ctl.connectServer()
 	if err != nil {
diff --git a/client/proxy/general_tcp.go b/client/proxy/general_tcp.go
index 7efe476f..cea9ef5b 100644
--- a/client/proxy/general_tcp.go
+++ b/client/proxy/general_tcp.go
@@ -40,7 +40,7 @@ type GeneralTCPProxy struct {
 	*BaseProxy
 }
 
-func NewGeneralTCPProxy(baseProxy *BaseProxy, cfg config.ProxyConf) Proxy {
+func NewGeneralTCPProxy(baseProxy *BaseProxy, _ config.ProxyConf) Proxy {
 	return &GeneralTCPProxy{
 		BaseProxy: baseProxy,
 	}
diff --git a/client/proxy/sudp.go b/client/proxy/sudp.go
index 0981c656..fbbe87ca 100644
--- a/client/proxy/sudp.go
+++ b/client/proxy/sudp.go
@@ -77,7 +77,7 @@ func (pxy *SUDPProxy) Close() {
 	}
 }
 
-func (pxy *SUDPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
+func (pxy *SUDPProxy) InWorkConn(conn net.Conn, _ *msg.StartWorkConn) {
 	xl := pxy.xl
 	xl.Info("incoming a new work connection for sudp proxy, %s", conn.RemoteAddr().String())
 
diff --git a/client/proxy/udp.go b/client/proxy/udp.go
index cc187000..58f30cb2 100644
--- a/client/proxy/udp.go
+++ b/client/proxy/udp.go
@@ -86,7 +86,7 @@ func (pxy *UDPProxy) Close() {
 	}
 }
 
-func (pxy *UDPProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
+func (pxy *UDPProxy) InWorkConn(conn net.Conn, _ *msg.StartWorkConn) {
 	xl := pxy.xl
 	xl.Info("incoming a new work connection for udp proxy, %s", conn.RemoteAddr().String())
 	// close resources releated with old workConn
diff --git a/client/visitor/xtcp.go b/client/visitor/xtcp.go
index 713ed341..02bc34c4 100644
--- a/client/visitor/xtcp.go
+++ b/client/visitor/xtcp.go
@@ -370,7 +370,7 @@ func (ks *KCPTunnelSession) Init(listenConn *net.UDPConn, raddr *net.UDPAddr) er
 	return nil
 }
 
-func (ks *KCPTunnelSession) OpenConn(ctx context.Context) (net.Conn, error) {
+func (ks *KCPTunnelSession) OpenConn(_ context.Context) (net.Conn, error) {
 	ks.mu.RLock()
 	defer ks.mu.RUnlock()
 	session := ks.session
diff --git a/pkg/config/proxy.go b/pkg/config/proxy.go
index ae1d077c..1169fd75 100644
--- a/pkg/config/proxy.go
+++ b/pkg/config/proxy.go
@@ -527,11 +527,8 @@ func (cfg *TCPProxyConf) ValidateForClient() (err error) {
 	return
 }
 
-func (cfg *TCPProxyConf) ValidateForServer(serverCfg ServerCommonConf) error {
-	if err := cfg.BaseProxyConf.validateForServer(); err != nil {
-		return err
-	}
-	return nil
+func (cfg *TCPProxyConf) ValidateForServer(_ ServerCommonConf) error {
+	return cfg.BaseProxyConf.validateForServer()
 }
 
 // TCPMux
@@ -644,11 +641,8 @@ func (cfg *UDPProxyConf) ValidateForClient() (err error) {
 	return
 }
 
-func (cfg *UDPProxyConf) ValidateForServer(serverCfg ServerCommonConf) error {
-	if err := cfg.BaseProxyConf.validateForServer(); err != nil {
-		return err
-	}
-	return nil
+func (cfg *UDPProxyConf) ValidateForServer(_ ServerCommonConf) error {
+	return cfg.BaseProxyConf.validateForServer()
 }
 
 // HTTP
@@ -821,11 +815,8 @@ func (cfg *SUDPProxyConf) ValidateForClient() (err error) {
 	return nil
 }
 
-func (cfg *SUDPProxyConf) ValidateForServer(serverCfg ServerCommonConf) error {
-	if err := cfg.BaseProxyConf.validateForServer(); err != nil {
-		return err
-	}
-	return nil
+func (cfg *SUDPProxyConf) ValidateForServer(_ ServerCommonConf) error {
+	return cfg.BaseProxyConf.validateForServer()
 }
 
 // STCP
@@ -875,11 +866,8 @@ func (cfg *STCPProxyConf) ValidateForClient() (err error) {
 	return
 }
 
-func (cfg *STCPProxyConf) ValidateForServer(serverCfg ServerCommonConf) error {
-	if err := cfg.BaseProxyConf.validateForServer(); err != nil {
-		return err
-	}
-	return nil
+func (cfg *STCPProxyConf) ValidateForServer(_ ServerCommonConf) error {
+	return cfg.BaseProxyConf.validateForServer()
 }
 
 // XTCP
@@ -928,9 +916,6 @@ func (cfg *XTCPProxyConf) ValidateForClient() (err error) {
 	return
 }
 
-func (cfg *XTCPProxyConf) ValidateForServer(serverCfg ServerCommonConf) error {
-	if err := cfg.BaseProxyConf.validateForServer(); err != nil {
-		return err
-	}
-	return nil
+func (cfg *XTCPProxyConf) ValidateForServer(_ ServerCommonConf) error {
+	return cfg.BaseProxyConf.validateForServer()
 }
diff --git a/pkg/config/proxy_test.go b/pkg/config/proxy_test.go
index 9ef6f87c..99d60811 100644
--- a/pkg/config/proxy_test.go
+++ b/pkg/config/proxy_test.go
@@ -35,7 +35,7 @@ var (
 	testProxyPrefix = "test."
 )
 
-func Test_Proxy_Interface(t *testing.T) {
+func Test_Proxy_Interface(_ *testing.T) {
 	for name := range proxyConfTypeMap {
 		NewConfByType(name)
 	}
diff --git a/pkg/config/visitor_test.go b/pkg/config/visitor_test.go
index 0f4171db..46cbef5a 100644
--- a/pkg/config/visitor_test.go
+++ b/pkg/config/visitor_test.go
@@ -25,7 +25,7 @@ import (
 
 const testVisitorPrefix = "test."
 
-func Test_Visitor_Interface(t *testing.T) {
+func Test_Visitor_Interface(_ *testing.T) {
 	for name := range visitorConfTypeMap {
 		DefaultVisitorConf(name)
 	}
diff --git a/pkg/metrics/mem/server.go b/pkg/metrics/mem/server.go
index e8ebd9d4..d721090c 100644
--- a/pkg/metrics/mem/server.go
+++ b/pkg/metrics/mem/server.go
@@ -129,7 +129,7 @@ func (m *serverMetrics) CloseProxy(name string, proxyType string) {
 	}
 }
 
-func (m *serverMetrics) OpenConnection(name string, proxyType string) {
+func (m *serverMetrics) OpenConnection(name string, _ string) {
 	m.info.CurConns.Inc(1)
 
 	m.mu.Lock()
@@ -141,7 +141,7 @@ func (m *serverMetrics) OpenConnection(name string, proxyType string) {
 	}
 }
 
-func (m *serverMetrics) CloseConnection(name string, proxyType string) {
+func (m *serverMetrics) CloseConnection(name string, _ string) {
 	m.info.CurConns.Dec(1)
 
 	m.mu.Lock()
@@ -153,7 +153,7 @@ func (m *serverMetrics) CloseConnection(name string, proxyType string) {
 	}
 }
 
-func (m *serverMetrics) AddTrafficIn(name string, proxyType string, trafficBytes int64) {
+func (m *serverMetrics) AddTrafficIn(name string, _ string, trafficBytes int64) {
 	m.info.TotalTrafficIn.Inc(trafficBytes)
 
 	m.mu.Lock()
@@ -166,7 +166,7 @@ func (m *serverMetrics) AddTrafficIn(name string, proxyType string, trafficBytes
 	}
 }
 
-func (m *serverMetrics) AddTrafficOut(name string, proxyType string, trafficBytes int64) {
+func (m *serverMetrics) AddTrafficOut(name string, _ string, trafficBytes int64) {
 	m.info.TotalTrafficOut.Inc(trafficBytes)
 
 	m.mu.Lock()
diff --git a/pkg/metrics/prometheus/server.go b/pkg/metrics/prometheus/server.go
index 19eceb72..56dea6e8 100644
--- a/pkg/metrics/prometheus/server.go
+++ b/pkg/metrics/prometheus/server.go
@@ -29,11 +29,11 @@ func (m *serverMetrics) CloseClient() {
 	m.clientCount.Dec()
 }
 
-func (m *serverMetrics) NewProxy(name string, proxyType string) {
+func (m *serverMetrics) NewProxy(_ string, proxyType string) {
 	m.proxyCount.WithLabelValues(proxyType).Inc()
 }
 
-func (m *serverMetrics) CloseProxy(name string, proxyType string) {
+func (m *serverMetrics) CloseProxy(_ string, proxyType string) {
 	m.proxyCount.WithLabelValues(proxyType).Dec()
 }
 
diff --git a/pkg/nathole/utils.go b/pkg/nathole/utils.go
index c889c7eb..22ba016f 100644
--- a/pkg/nathole/utils.go
+++ b/pkg/nathole/utils.go
@@ -45,10 +45,7 @@ func DecodeMessageInto(data, key []byte, m msg.Message) error {
 		return err
 	}
 
-	if err := msg.ReadMsgInto(bytes.NewReader(buf), m); err != nil {
-		return err
-	}
-	return nil
+	return msg.ReadMsgInto(bytes.NewReader(buf), m)
 }
 
 type ChangedAddress struct {
diff --git a/pkg/plugin/client/http2https.go b/pkg/plugin/client/http2https.go
index f84b0a0c..beacab00 100644
--- a/pkg/plugin/client/http2https.go
+++ b/pkg/plugin/client/http2https.go
@@ -97,7 +97,7 @@ func NewHTTP2HTTPSPlugin(params map[string]string) (Plugin, error) {
 	return p, nil
 }
 
-func (p *HTTP2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (p *HTTP2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 	_ = p.l.PutConn(wrapConn)
 }
@@ -107,8 +107,5 @@ func (p *HTTP2HTTPSPlugin) Name() string {
 }
 
 func (p *HTTP2HTTPSPlugin) Close() error {
-	if err := p.s.Close(); err != nil {
-		return err
-	}
-	return nil
+	return p.s.Close()
 }
diff --git a/pkg/plugin/client/http_proxy.go b/pkg/plugin/client/http_proxy.go
index 51a191be..f9e5dae8 100644
--- a/pkg/plugin/client/http_proxy.go
+++ b/pkg/plugin/client/http_proxy.go
@@ -68,7 +68,7 @@ func (hp *HTTPProxy) Name() string {
 	return PluginHTTPProxy
 }
 
-func (hp *HTTPProxy) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (hp *HTTPProxy) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 
 	sc, rd := libnet.NewSharedConn(wrapConn)
diff --git a/pkg/plugin/client/https2http.go b/pkg/plugin/client/https2http.go
index 55edf832..71cc025c 100644
--- a/pkg/plugin/client/https2http.go
+++ b/pkg/plugin/client/https2http.go
@@ -122,7 +122,7 @@ func (p *HTTPS2HTTPPlugin) genTLSConfig() (*tls.Config, error) {
 	return config, nil
 }
 
-func (p *HTTPS2HTTPPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (p *HTTPS2HTTPPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 	_ = p.l.PutConn(wrapConn)
 }
@@ -132,8 +132,5 @@ func (p *HTTPS2HTTPPlugin) Name() string {
 }
 
 func (p *HTTPS2HTTPPlugin) Close() error {
-	if err := p.s.Close(); err != nil {
-		return err
-	}
-	return nil
+	return p.s.Close()
 }
diff --git a/pkg/plugin/client/https2https.go b/pkg/plugin/client/https2https.go
index c236c4c8..d925ec24 100644
--- a/pkg/plugin/client/https2https.go
+++ b/pkg/plugin/client/https2https.go
@@ -127,7 +127,7 @@ func (p *HTTPS2HTTPSPlugin) genTLSConfig() (*tls.Config, error) {
 	return config, nil
 }
 
-func (p *HTTPS2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (p *HTTPS2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 	_ = p.l.PutConn(wrapConn)
 }
@@ -137,8 +137,5 @@ func (p *HTTPS2HTTPSPlugin) Name() string {
 }
 
 func (p *HTTPS2HTTPSPlugin) Close() error {
-	if err := p.s.Close(); err != nil {
-		return err
-	}
-	return nil
+	return p.s.Close()
 }
diff --git a/pkg/plugin/client/socks5.go b/pkg/plugin/client/socks5.go
index 06a88b64..805f956b 100644
--- a/pkg/plugin/client/socks5.go
+++ b/pkg/plugin/client/socks5.go
@@ -50,7 +50,7 @@ func NewSocks5Plugin(params map[string]string) (p Plugin, err error) {
 	return
 }
 
-func (sp *Socks5Plugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (sp *Socks5Plugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	defer conn.Close()
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 	_ = sp.Server.ServeConn(wrapConn)
diff --git a/pkg/plugin/client/static_file.go b/pkg/plugin/client/static_file.go
index 32a888ae..45f731bb 100644
--- a/pkg/plugin/client/static_file.go
+++ b/pkg/plugin/client/static_file.go
@@ -76,7 +76,7 @@ func NewStaticFilePlugin(params map[string]string) (Plugin, error) {
 	return sp, nil
 }
 
-func (sp *StaticFilePlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (sp *StaticFilePlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, _ []byte) {
 	wrapConn := utilnet.WrapReadWriteCloserToConn(conn, realConn)
 	_ = sp.l.PutConn(wrapConn)
 }
diff --git a/pkg/plugin/client/unix_domain_socket.go b/pkg/plugin/client/unix_domain_socket.go
index 416938b3..03371356 100644
--- a/pkg/plugin/client/unix_domain_socket.go
+++ b/pkg/plugin/client/unix_domain_socket.go
@@ -51,7 +51,7 @@ func NewUnixDomainSocketPlugin(params map[string]string) (p Plugin, err error) {
 	return
 }
 
-func (uds *UnixDomainSocketPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
+func (uds *UnixDomainSocketPlugin) Handle(conn io.ReadWriteCloser, _ net.Conn, extraBufToLocal []byte) {
 	localConn, err := net.DialUnix("unix", nil, uds.UnixAddr)
 	if err != nil {
 		return
diff --git a/pkg/plugin/server/http.go b/pkg/plugin/server/http.go
index b120332d..0f561204 100644
--- a/pkg/plugin/server/http.go
+++ b/pkg/plugin/server/http.go
@@ -120,8 +120,5 @@ func (p *httpPlugin) do(ctx context.Context, r *Request, res *Response) error {
 	if err != nil {
 		return err
 	}
-	if err = json.Unmarshal(buf, res); err != nil {
-		return err
-	}
-	return nil
+	return json.Unmarshal(buf, res)
 }
diff --git a/pkg/transport/tls.go b/pkg/transport/tls.go
index 13e241b2..d92b1a82 100644
--- a/pkg/transport/tls.go
+++ b/pkg/transport/tls.go
@@ -103,9 +103,7 @@ func NewServerTLSConfig(certPath, keyPath, caPath string) (*tls.Config, error) {
 func NewClientTLSConfig(certPath, keyPath, caPath, serverName string) (*tls.Config, error) {
 	base := &tls.Config{}
 
-	if certPath == "" || keyPath == "" {
-		// client will not generate tls conf by itself
-	} else {
+	if certPath != "" && keyPath != "" {
 		cert, err := newCustomTLSKeyPair(certPath, keyPath)
 		if err != nil {
 			return nil, err
diff --git a/pkg/util/net/udp.go b/pkg/util/net/udp.go
index 599447c3..79ebbb14 100644
--- a/pkg/util/net/udp.go
+++ b/pkg/util/net/udp.go
@@ -140,15 +140,15 @@ func (c *FakeUDPConn) RemoteAddr() net.Addr {
 	return c.remoteAddr
 }
 
-func (c *FakeUDPConn) SetDeadline(t time.Time) error {
+func (c *FakeUDPConn) SetDeadline(_ time.Time) error {
 	return nil
 }
 
-func (c *FakeUDPConn) SetReadDeadline(t time.Time) error {
+func (c *FakeUDPConn) SetReadDeadline(_ time.Time) error {
 	return nil
 }
 
-func (c *FakeUDPConn) SetWriteDeadline(t time.Time) error {
+func (c *FakeUDPConn) SetWriteDeadline(_ time.Time) error {
 	return nil
 }
 
@@ -263,4 +263,4 @@ func (l *UDPListener) Addr() net.Addr {
 type ConnectedUDPConn struct{ *net.UDPConn }
 
 // WriteTo redirects all writes to the Write syscall, which is 4 times faster.
-func (c *ConnectedUDPConn) WriteTo(b []byte, addr net.Addr) (int, error) { return c.Write(b) }
+func (c *ConnectedUDPConn) WriteTo(b []byte, _ net.Addr) (int, error) { return c.Write(b) }
diff --git a/pkg/util/tcpmux/httpconnect.go b/pkg/util/tcpmux/httpconnect.go
index d6c0ce51..650891f4 100644
--- a/pkg/util/tcpmux/httpconnect.go
+++ b/pkg/util/tcpmux/httpconnect.go
@@ -66,7 +66,7 @@ func (muxer *HTTPConnectTCPMuxer) readHTTPConnectRequest(rd io.Reader) (host, ht
 	return
 }
 
-func (muxer *HTTPConnectTCPMuxer) sendConnectResponse(c net.Conn, reqInfo map[string]string) error {
+func (muxer *HTTPConnectTCPMuxer) sendConnectResponse(c net.Conn, _ map[string]string) error {
 	if muxer.passthrough {
 		return nil
 	}
diff --git a/pkg/util/vhost/https.go b/pkg/util/vhost/https.go
index 991c9294..e15c1901 100644
--- a/pkg/util/vhost/https.go
+++ b/pkg/util/vhost/https.go
@@ -74,10 +74,10 @@ type readOnlyConn struct {
 }
 
 func (conn readOnlyConn) Read(p []byte) (int, error)         { return conn.reader.Read(p) }
-func (conn readOnlyConn) Write(p []byte) (int, error)        { return 0, io.ErrClosedPipe }
+func (conn readOnlyConn) Write(_ []byte) (int, error)        { return 0, io.ErrClosedPipe }
 func (conn readOnlyConn) Close() error                       { return nil }
 func (conn readOnlyConn) LocalAddr() net.Addr                { return nil }
 func (conn readOnlyConn) RemoteAddr() net.Addr               { return nil }
-func (conn readOnlyConn) SetDeadline(t time.Time) error      { return nil }
-func (conn readOnlyConn) SetReadDeadline(t time.Time) error  { return nil }
-func (conn readOnlyConn) SetWriteDeadline(t time.Time) error { return nil }
+func (conn readOnlyConn) SetDeadline(_ time.Time) error      { return nil }
+func (conn readOnlyConn) SetReadDeadline(_ time.Time) error  { return nil }
+func (conn readOnlyConn) SetWriteDeadline(_ time.Time) error { return nil }
diff --git a/server/control.go b/server/control.go
index 637a76b5..9764b7c1 100644
--- a/server/control.go
+++ b/server/control.go
@@ -434,10 +434,9 @@ func (ctl *Control) manager() {
 	defer ctl.managerShutdown.Done()
 
 	var heartbeatCh <-chan time.Time
-	if ctl.serverCfg.TCPMux || ctl.serverCfg.HeartbeatTimeout <= 0 {
-		// Don't need application heartbeat here.
-		// yamux will do same thing.
-	} else {
+	// Don't need application heartbeat if TCPMux is enabled,
+	// yamux will do same thing.
+	if !ctl.serverCfg.TCPMux && ctl.serverCfg.HeartbeatTimeout > 0 {
 		heartbeat := time.NewTicker(time.Second)
 		defer heartbeat.Stop()
 		heartbeatCh = heartbeat.C
diff --git a/server/dashboard_api.go b/server/dashboard_api.go
index ee758429..198a111a 100644
--- a/server/dashboard_api.go
+++ b/server/dashboard_api.go
@@ -55,7 +55,7 @@ type serverInfoResp struct {
 }
 
 // /healthz
-func (svr *Service) Healthz(w http.ResponseWriter, r *http.Request) {
+func (svr *Service) Healthz(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(200)
 }
 
diff --git a/server/group/http.go b/server/group/http.go
index 64091925..26af595e 100644
--- a/server/group/http.go
+++ b/server/group/http.go
@@ -43,7 +43,7 @@ func (ctl *HTTPGroupController) Register(
 	return g.Register(proxyName, group, groupKey, routeConfig)
 }
 
-func (ctl *HTTPGroupController) UnRegister(proxyName, group string, routeConfig vhost.RouteConfig) {
+func (ctl *HTTPGroupController) UnRegister(proxyName, group string, _ vhost.RouteConfig) {
 	indexKey := group
 	ctl.mu.Lock()
 	defer ctl.mu.Unlock()
diff --git a/server/metrics/metrics.go b/server/metrics/metrics.go
index faf00d14..5064a238 100644
--- a/server/metrics/metrics.go
+++ b/server/metrics/metrics.go
@@ -27,11 +27,11 @@ func Register(m ServerMetrics) {
 
 type noopServerMetrics struct{}
 
-func (noopServerMetrics) NewClient()                                                      {}
-func (noopServerMetrics) CloseClient()                                                    {}
-func (noopServerMetrics) NewProxy(name string, proxyType string)                          {}
-func (noopServerMetrics) CloseProxy(name string, proxyType string)                        {}
-func (noopServerMetrics) OpenConnection(name string, proxyType string)                    {}
-func (noopServerMetrics) CloseConnection(name string, proxyType string)                   {}
-func (noopServerMetrics) AddTrafficIn(name string, proxyType string, trafficBytes int64)  {}
-func (noopServerMetrics) AddTrafficOut(name string, proxyType string, trafficBytes int64) {}
+func (noopServerMetrics) NewClient()                          {}
+func (noopServerMetrics) CloseClient()                        {}
+func (noopServerMetrics) NewProxy(string, string)             {}
+func (noopServerMetrics) CloseProxy(string, string)           {}
+func (noopServerMetrics) OpenConnection(string, string)       {}
+func (noopServerMetrics) CloseConnection(string, string)      {}
+func (noopServerMetrics) AddTrafficIn(string, string, int64)  {}
+func (noopServerMetrics) AddTrafficOut(string, string, int64) {}
diff --git a/test/e2e/framework/mockservers.go b/test/e2e/framework/mockservers.go
index 32f7ac38..2aea36da 100644
--- a/test/e2e/framework/mockservers.go
+++ b/test/e2e/framework/mockservers.go
@@ -56,10 +56,7 @@ func (m *MockServers) Run() error {
 	if err := m.udsEchoServer.Run(); err != nil {
 		return err
 	}
-	if err := m.httpSimpleServer.Run(); err != nil {
-		return err
-	}
-	return nil
+	return m.httpSimpleServer.Run()
 }
 
 func (m *MockServers) Close() {