diff --git a/README.md b/README.md
index c00ce75..a881e88 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,9 @@ RTree implementation for Go
 
 This package provides an in-memory R-Tree implementation for Go, useful as a spatial data structure. It has support for 1-4 dimensions, and can store and search multidimensions interchangably in the same tree.
 
-AUTHORS
+**This package only works in Go 1.6 or higher**
+
+Authors
 -------
 * 1983 Original algorithm and test code by Antonin Guttman and Michael Stonebraker, UC Berkely
 * 1994 ANCI C ported from original test code by Melinda Green