diff --git a/labscript_devices/PrawnDO/blacs_workers.py b/labscript_devices/PrawnDO/blacs_workers.py
index 4b7537c9..daf63998 100644
--- a/labscript_devices/PrawnDO/blacs_workers.py
+++ b/labscript_devices/PrawnDO/blacs_workers.py
@@ -28,7 +28,7 @@ def __init__(self, com_port, pico_board):
         global struct; import struct
 
         self.timeout = 0.2
-        self.conn = serial.Serial(com_port, 10000000, timeout=self.timeout)
+        self.conn = serial.Serial(com_port, 1000000, timeout=self.timeout)
         self.pico_board = pico_board
         
         version = self.get_version()