diff --git a/README.md b/README.md
index 192c940..8b42325 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@ Whalesong
 Important
 ---------
 
-Whalesong needs Racket 5.2.
-As is Whalesong doesn't work on version 5.3 or greater.
+Whalesong needs Racket 6.2.
+As is Whalesong doesn't work on version 6.3 or greater.
 See https://github.com/soegaard/whalesong/issues/48
 
 Installation