README.md in disco-0.2.9 vs README.md in disco-0.3.0

@@ -240,10 +240,10 @@
 recommender = Disco::Recommender.new(top_items: true)
 recommender.fit(data)
 recommender.top_items
 ```
 
-This uses [Wilson score](https://www.evanmiller.org/how-not-to-sort-by-average-rating.html) for explicit feedback (add [wilson_score](https://github.com/instacart/wilson_score) to your application’s Gemfile) and item frequency for implicit feedback.
+This uses [Wilson score](https://www.evanmiller.org/how-not-to-sort-by-average-rating.html) for explicit feedback and item frequency for implicit feedback.
 
 ## Data
 
 Data can be an array of hashes