diff --git a/README.md b/README.md
index fb343a9..3a4d5e7 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ The simplest way to group by:
 
 :cake: Get the entire series - **the other best part**
 
-Works with Rails 3.0+
+Works with Rails 3.1+
 
 Supports PostgreSQL and MySQL, plus Arrays and Hashes
 
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libgit2 0.21.0