It's not you who fixes Chuck Norris. It's Chuck Norris who fixes you.

klafytg/bots/chuck_norris.py

@@ -10,5 +10,5 @@ def get_content():
     return json.loads(r.content)["value"]
 
 
-def on_ping(bot, user, channel, message):
+def on_ping(bot, update, context):
     return get_content()