diff --git a/.gitignore b/.gitignore
index 865b8c0..3ca4900 100644
--- a/.gitignore
+++ b/.gitignore
@@ -103,3 +103,5 @@ venv.bak/
 
 # mypy
 .mypy_cache/
+
+edl_config.json
\ No newline at end of file
diff --git a/edlclient/Library/Connection/usblib.py b/edlclient/Library/Connection/usblib.py
index 54a129d..6fe2de6 100755
--- a/edlclient/Library/Connection/usblib.py
+++ b/edlclient/Library/Connection/usblib.py
@@ -49,6 +49,8 @@ USB_RECIP_OTHER = 0x03
 USB_RECIP_PORT = 0x04
 USB_RECIP_RPIPE = 0x05
 
+MAX_USB_BULK_BUFFER_SIZE = 16384
+
 tag = 0
 
 CDC_CMDS = {
@@ -336,7 +338,8 @@ class usb_class(DeviceClass):
 
     def write(self, command, pktsize=None):
         if pktsize is None:
-            pktsize = self.EP_OUT.wMaxPacketSize
+            #pktsize = self.EP_OUT.wMaxPacketSize
+            pktsize = MAX_USB_BULK_BUFFER_SIZE
         if isinstance(command, str):
             command = bytes(command, 'utf-8')
         pos = 0