diff --git a/relay.py b/relay.py
index 4b36627..93119f9 100755
--- a/relay.py
+++ b/relay.py
@@ -36,7 +36,7 @@ else:
 
 find_ttyUSB_output = subprocess.check_output(["./find_ttyUSB.sh"])
 device = None
-for line in find_ttyUSB_output.split("\n"):
+for line in find_ttyUSB_output.decode('utf-8').split("\n"):
   if "FTDI_FT232R_USB_UART_A50285BI" in line:
     device = line.split(" ")[0]
     break