diff --git a/mitm.rb b/mitm.rb
index 813513a..288ce5f 100755
--- a/mitm.rb
+++ b/mitm.rb
@@ -7,6 +7,10 @@ require './telegram'
 pc_serial = SerialPort.open("/dev/ttyUSB0",{ baud: 57600, databits: 8, parity: SerialPort::ODD, stop_bit: 1, flow_control: SerialPort::NONE})
 ps_serial = SerialPort.open("/dev/ttyACM0",{ baud: 115200, databits: 8, parity: SerialPort::ODD, stop_bit: 1, flow_control: SerialPort::NONE})
 
+# ensure serial settings (weird bug)
+pc_serial.baud = 57600
+pc_serial.parity = SerialPort::ODD
+
 while true
   activities = IO.select([pc_serial,ps_serial])
   activities[0].each do |activity|