diff --git a/bridge/bridge.go b/bridge/bridge.go
index e372908..ea5c282 100755
--- a/bridge/bridge.go
+++ b/bridge/bridge.go
@@ -342,6 +342,7 @@ func (s *Bridge) SendLinkInfo(clientId int, link *conn.Link, t *file.Tunnel) (ta
 
 func (s *Bridge) ping() {
 	ticker := time.NewTicker(time.Second * 5)
+	defer ticker.Stop()
 	for {
 		select {
 		case <-ticker.C:
diff --git a/client/control.go b/client/control.go
index 3260113..5589d11 100644
--- a/client/control.go
+++ b/client/control.go
@@ -369,6 +369,7 @@ func sendP2PTestMsg(localConn *net.UDPConn, remoteAddr1, remoteAddr2, remoteAddr
 		}
 		logs.Trace("try send test packet to target %s", addr)
 		ticker := time.NewTicker(time.Millisecond * 500)
+		defer ticker.Stop()
 		for {
 			select {
 			case <-ticker.C:
@@ -394,6 +395,7 @@ func sendP2PTestMsg(localConn *net.UDPConn, remoteAddr1, remoteAddr2, remoteAddr
 						return
 					}
 					ticker := time.NewTicker(time.Second * 2)
+					defer ticker.Stop()
 					for {
 						select {
 						case <-ticker.C:
diff --git a/client/local.go b/client/local.go
index 55b9df9..06057ca 100644
--- a/client/local.go
+++ b/client/local.go
@@ -117,6 +117,7 @@ func StartLocalServer(l *config.LocalServer, config *config.CommonConfig) error
 
 func handleUdpMonitor(config *config.CommonConfig, l *config.LocalServer) {
 	ticker := time.NewTicker(time.Second * 1)
+	defer ticker.Stop()
 	for {
 		select {
 		case <-ticker.C:
diff --git a/lib/mux/mux.go b/lib/mux/mux.go
index a43510a..02b017a 100644
--- a/lib/mux/mux.go
+++ b/lib/mux/mux.go
@@ -173,9 +173,9 @@ func (s *Mux) ping() {
 		s.sendInfo(common.MUX_PING_FLAG, common.MUX_PING, now)
 		// send the ping flag and get the latency first
 		ticker := time.NewTicker(time.Second * 5)
+    defer ticker.Stop()
 		for {
 			if s.IsClose {
-				ticker.Stop()
 				break
 			}
 			select {
@@ -198,6 +198,7 @@ func (s *Mux) ping() {
 			}
 			atomic.AddUint32(&s.pingOk, 1)
 		}
+    return
 	}()
 }
 
diff --git a/server/server.go b/server/server.go
index 5e72617..911fde5 100644
--- a/server/server.go
+++ b/server/server.go
@@ -109,6 +109,7 @@ func StartNewServer(bridgePort int, cnf *file.Tunnel, bridgeType string) {
 
 func dealClientFlow() {
 	ticker := time.NewTicker(time.Minute)
+	defer ticker.Stop()
 	for {
 		select {
 		case <-ticker.C:
@@ -430,6 +431,7 @@ func GetDashboardData() map[string]interface{} {
 
 func flowSession(m time.Duration) {
 	ticker := time.NewTicker(m)
+	defer ticker.Stop()
 	for {
 		select {
 		case <-ticker.C: