README.md in weather-api-1.1.1 vs README.md in weather-api-1.2.0

@@ -20,10 +20,10 @@
     require 'rubygems'
     require 'weather-api'
 
     # look up WOEID via http://weather.yahoo.com; enter location by city
     # name or zip and WOEID is at end of resulting page url.
-    response = Weather.lookup(9830)
+    response = Weather.lookup(9830, Weather::Units::CELSIUS)
 
     print <<EOT
     #{response.title}
     #{response.condition.temp} degrees
     #{response.condition.text}