diff --git a/demo_cam_reader.html b/demo_cam_reader.html
index e04f5f3..e42d3aa 100644
--- a/demo_cam_reader.html
+++ b/demo_cam_reader.html
@@ -134,6 +134,7 @@ <h2>zxing-cpp/wasm live demo</h2>
 			navigator.mediaDevices
 				.getUserMedia({ video: { facingMode: deviceId }, audio: false })
 				.then(function (stream) {
+					stream.getTracks().forEach(track => track.stop());
 					video.srcObject = stream;
 					video.setAttribute("playsinline", true); // required to tell iOS safari we don't want fullscreen
 					video.play();