diff --git a/batik/README.md b/batik/README.md
index e4ea519a..0fe50610 100644
--- a/batik/README.md
+++ b/batik/README.md
@@ -1,5 +1,5 @@
 If you intend to use MathJax-node's ability to create PNG images, you
-should install [batik](http://xmlgraphics.apache.org/batik/download.html)
-in this directory.  Just download it and unpack it here.  You need
+should install [batik 1.7](http://xmlgraphics.apache.org/batik/download.html)
+in this directory.  Just download batik version 1.7 and unpack it here. You need
 `batik-rasterizer.jar` and the `lib` directory to be in the top level
 of this directory.