diff --git a/README.md b/README.md
index 906a497..ff07d07 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,11 @@ WordNet in JSON Format
 
 Such fun!
 
+This dataset is based on:
+Princeton University "About WordNet." WordNet. Princeton University. 2010. http://wordnet.princeton.edu
+
+Please cite them if you use this dataset.
+
 Download
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