diff --git a/examples/mqtt.py b/examples/mqtt.py
index 1922848..13bd44a 100644
--- a/examples/mqtt.py
+++ b/examples/mqtt.py
@@ -8,7 +8,7 @@ if os.path.exists(libdir):
     sys.path.append(libdir)
 
 import logging
-from waveshare_epd import epd2in13b_V4
+from waveshare_epd import epd2in13b_V3
 import time
 from PIL import Image,ImageDraw,ImageFont
 import traceback
@@ -22,7 +22,7 @@ Connected = False
 try:
     logging.info("epd2in13bc Demo")
     
-    epd = epd2in13b_V4.EPD()
+    epd = epd2in13b_V3.EPD()
     logging.info("init and Clear")
     epd.init()
     epd.Clear()