diff --git a/js/stm32.js b/js/stm32.js
index fa2a6a3245..5132850a6e 100644
--- a/js/stm32.js
+++ b/js/stm32.js
@@ -55,17 +55,18 @@ STM32_protocol.prototype.connect = function() {
     var baud = parseInt($('div#port-picker #baud').val());
     
     if (selected_port != '0') {
-        // get fastest supported bitrate for current platform
+        // get fastest supported bitrate for current platform (serial API for windows support baud > 115200 from chrome v 33+)
         switch (GUI.operating_system) {
             case 'Windows':
-                var flashing_bitrate = 256000;
+                var flashing_bitrate = 921600;
                 break;
             case 'MacOS':
             case 'ChromeOS':
             case 'Linux':
             case 'UNIX':
-                var flashing_bitrate = 230400;
+                var flashing_bitrate = 576000;
                 break;
+                
             default:
                 var flashing_bitrate = 115200;
         }