diff --git a/web_modules/ws.js b/web_modules/ws.js
index b2fca770..f384ff5d 100644
--- a/web_modules/ws.js
+++ b/web_modules/ws.js
@@ -1 +1,6 @@
-module.exports = WebSocket;
+// If there is no WebSocket, try MozWebSocket (support for some old browsers)
+try {
+  module.exports = WebSocket
+} catch(err) {
+  module.exports = MozWebSocket
+}
\ No newline at end of file