diff --git a/README.md b/README.md
index dd4413d..a59bd51 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 Maven External Version
 -----------------------
 
+Requires Maven 3.2.0 or later.
+
 (github is the temporary home.)
 
 What is this?