diff --git a/README.rdoc b/README.rdoc
index 9b05849..af1a0ae 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -38,7 +38,7 @@ This example shows how to wrap a method call with a Fibur.
 
 == REQUIREMENTS:
 
-* Only works on Ruby 1.9
+* Only works on Ruby 1.9 or greater
 
 == INSTALL: