diff --git a/README.md b/README.md
index d3c5b1e..d29d0ee 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ reveal.js comes with a broad range of features including [nested slides](https:/
 
 ## Online Editor
 
-Presentations are written using HTML or Markdown but there's also an online editor for those of you who prefer a graphical interface. Give it a try at [http://slides.com](http://slides.com).
+Presentations are written using HTML or Markdown but there's also an online editor for those of you who prefer a graphical interface. Give it a try at [http://slides.com](http://slides.com?ref=github).
 
 
 ## Instructions