README.md in active_recall-1.4.0 vs README.md in active_recall-1.5.0

- old
+ new
@@ -1,9 +1,9 @@
 # ActiveRecall
 
 **ActiveRecall** is a spaced-repetition system that allows you to treat arbitrary [ActiveRecord](https://github.com/rails/rails/tree/master/activerecord) models as if they were flashcards to be learned and reviewed.
 It it based on, and is intended to be backwards compatible with, the [okubo](https://github.com/rgravina/okubo) gem.
-The primary differentiating features are that it lets the user specify the scheduling algorithm and is fully compatible with Rails 6.0.
+The primary differentiating features are that it lets the user specify the scheduling algorithm and is fully compatible with Rails 6.0 and Ruby 3.0.
 
 ## Installation
 
 Add this line to your application's Gemfile:
 