diff --git a/cbpi/cli.py b/cbpi/cli.py
index f90d3ad..a830f33 100644
--- a/cbpi/cli.py
+++ b/cbpi/cli.py
@@ -68,7 +68,7 @@ def create_home_folder_structure():
 
 def setup_one_wire():
     print("Setting up 1Wire")
-    with open('/boot/config.txt', 'wb') as f:
+    with open('/boot/config.txt', 'w') as f:
         f.write("dtoverlay=w1-gpio,gpiopin=4,pullup=on")
     print("/boot/config.txt created")