diff --git a/rshell/main.py b/rshell/main.py
index 23b64d3..5335795 100755
--- a/rshell/main.py
+++ b/rshell/main.py
@@ -145,7 +145,7 @@
 IS_UPY = False
 DEBUG = False
 USB_BUFFER_SIZE = 512
-RPI_PICO_USB_BUFFER_SIZE = 128
+RPI_PICO_USB_BUFFER_SIZE = 32
 UART_BUFFER_SIZE = 32
 BUFFER_SIZE = USB_BUFFER_SIZE
 QUIET = False
@@ -327,8 +327,6 @@ def autoscan():
     """
     for port in serial.tools.list_ports.comports():
         if is_micropython_usb_device(port):
-            global BUFFER_SIZE
-            BUFFER_SIZE = USB_BUFFER_SIZE
             connect_serial(port[0])
 
 
diff --git a/rshell/version.py b/rshell/version.py
index c4d4fdc..138343c 100644
--- a/rshell/version.py
+++ b/rshell/version.py
@@ -1 +1 @@
-__version__ = '0.0.30'
+__version__ = '0.0.31'