diff --git a/howTo/apiOpenWeather.R b/howTo/apiOpenWeather.R
index a4801f84522245610d19718156143f5c950356b8..200ea673b42c7b856e18eef719952ed6fc3707ae 100644
--- a/howTo/apiOpenWeather.R
+++ b/howTo/apiOpenWeather.R
@@ -1,4 +1,5 @@
 # Open Weather API
+# https://openweathermap.org/api
 
 library(woRkflow) # load workflow package
 woRkflow::setup() # load env.R set up the default paths etc