diff --git a/README.md b/README.md
index b9c1db8..a9126b0 100644
--- a/README.md
+++ b/README.md
@@ -40,4 +40,13 @@ Distributed under the XYZ license. See ``LICENSE`` for more information.
 2. Create your feature branch (`git checkout -b feature/fooBar`)
 3. Commit your changes (`git commit -am 'Add some fooBar'`)
 4. Push to the branch (`git push origin feature/fooBar`)
-5. Create a new Pull Request
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+5. Create a new Pull Request
+
+## Attribution
+
+Big thank you to the VADER team:
+nltk.sentiment.vader
+
+Hutto, C.J. & Gilbert, E.E. (2014). VADER: A Parsimonious Rule-based Model for
+Sentiment Analysis of Social Media Text. Eighth International Conference on
+Weblogs and Social Media (ICWSM-14). Ann Arbor, MI, June 2014.
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