diff --git a/README.md b/README.md
index a96143f..a2a2d91 100644
--- a/README.md
+++ b/README.md
@@ -184,4 +184,4 @@ When creating your own challange the process should be something like this:
     - And perhaps doing some of your own stuff, like:
         - Sending messages then handling these in event handlers written in step 4
         - Sending triggers to step the FSM
-        - Including images of cats
+        - Including images of cats – http://thecatapi.com