webtorrent/tracker_client.go | 2 ++

diff --git a/webtorrent/tracker_client.go b/webtorrent/tracker_client.go
index 4d2ae4991624e6989d84028ffaf0827d8db642af..7972fb08beb7ca751762bd932c9b0e88364447cb 100644
--- a/webtorrent/tracker_client.go
+++ b/webtorrent/tracker_client.go
@@ -67,7 +67,9 @@ type onDataChannelOpen func(_ datachannel.ReadWriteCloser, dcc DataChannelContext)
 
 func (tc *TrackerClient) doWebsocket() error {
 	metrics.Add("websocket dials", 1)
+	tc.mu.Lock()
 	tc.stats.Dials++
+	tc.mu.Unlock()
 	c, _, err := websocket.DefaultDialer.Dial(tc.Url, nil)
 	if err != nil {
 		return fmt.Errorf("dialing tracker: %w", err)