diff --git a/lib/listener.js b/lib/listener.js
index 76de5c5..b1ca711 100755
--- a/lib/listener.js
+++ b/lib/listener.js
@@ -104,6 +104,10 @@ internals.Listener.prototype._close = async function () {
     await Promise.all(Object.keys(this._sockets._items).map((id) => this._sockets._items[id].disconnect()));
 
     this._wss.close();
+
+    for (const ws of this._wss.clients) {
+        ws.terminate();
+    }
 };