README.md in barometer-0.9.2 vs README.md in barometer-0.9.3

- old
+ new

@@ -84,10 +84,10 @@
 
 * Wunderground.com (:wunderground) [default]
 * Yahoo! Weather (:yahoo)
 * WeatherBug.com (:weather_bug) [requires key]
 * NOAA (:noaa)
-* Forecast.io (:forecast_io) [requires key]
+* Forecast.io (:forecast_io) [requires key + [barometer-forecast_io gem](https://github.com/attack/barometer-forecast_io)]
 
 ### Source Configuration
 
 Barometer can be configured to use multiple weather service APIs (either in
 a primary/failover config or in parallel).  Each weather service can also