diff --git a/README.md b/README.md
index d5b8ff2..fec3edb 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # rct-guest
 
 rct-guest looks too intense for me!
+
+The information in `data.json` was obtained from [the RCT wiki](https://rct.fandom.com/wiki/RollerCoaster_Tycoon_Wiki). `data.json` is available under a [CC-BY-SA](https://creativecommons.org/licenses/by-sa/4.0/) license. The information was compiled from multiple pages and reorganised into the JSON format.