diff --git a/dialer/icmp/conn.go b/dialer/icmp/conn.go
index cac6aa7e..b6797bf2 100644
--- a/dialer/icmp/conn.go
+++ b/dialer/icmp/conn.go
@@ -23,6 +23,15 @@ func (session *quicSession) GetConn() (*quicConn, error) {
 	}, nil
 }
 
+func (session *quicSession) IsClosed() bool {
+	select {
+	case <-session.session.Context().Done():
+		return true
+	default:
+		return false
+	}
+}
+
 func (session *quicSession) Close() error {
 	return session.session.CloseWithError(quic.ApplicationErrorCode(0), "closed")
 }
diff --git a/dialer/icmp/dialer.go b/dialer/icmp/dialer.go
index dff41ad2..bd87d403 100644
--- a/dialer/icmp/dialer.go
+++ b/dialer/icmp/dialer.go
@@ -78,6 +78,10 @@ func (d *icmpDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialO
 	defer d.sessionMutex.Unlock()
 
 	session, ok := d.sessions[addr]
+	if session != nil && session.IsClosed() {
+		delete(d.sessions, addr) // session is dead
+		ok = false
+	}
 	if !ok {
 		options := &dialer.DialOptions{}
 		for _, opt := range opts {
diff --git a/dialer/quic/conn.go b/dialer/quic/conn.go
index cac6aa7e..b6797bf2 100644
--- a/dialer/quic/conn.go
+++ b/dialer/quic/conn.go
@@ -23,6 +23,15 @@ func (session *quicSession) GetConn() (*quicConn, error) {
 	}, nil
 }
 
+func (session *quicSession) IsClosed() bool {
+	select {
+	case <-session.session.Context().Done():
+		return true
+	default:
+		return false
+	}
+}
+
 func (session *quicSession) Close() error {
 	return session.session.CloseWithError(quic.ApplicationErrorCode(0), "closed")
 }
diff --git a/dialer/quic/dialer.go b/dialer/quic/dialer.go
index 55812787..a12a1008 100644
--- a/dialer/quic/dialer.go
+++ b/dialer/quic/dialer.go
@@ -61,6 +61,10 @@ func (d *quicDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialO
 	defer d.sessionMutex.Unlock()
 
 	session, ok := d.sessions[addr]
+	if session != nil && session.IsClosed() {
+		delete(d.sessions, addr) // session is dead
+		ok = false
+	}
 	if !ok {
 		options := &dialer.DialOptions{}
 		for _, opt := range opts {