diff --git a/data-visualize.Rmd b/data-visualize.Rmd
index d976dd5..e17e724 100644
--- a/data-visualize.Rmd
+++ b/data-visualize.Rmd
@@ -682,7 +682,7 @@ There are three reasons you might need to use a stat explicitly:
 
 ggplot2 provides over 20 stats for you to use.
 Each stat is a function, so you can get help in the usual way, e.g. `?stat_bin`.
-To see a complete list of stats, try the ggplot2 cheatsheet.
+To see a complete list of stats, try the [ggplot2 cheatsheet](<http://rstudio.com/resources/cheatsheets>).
 
 ### Exercises