diff --git a/README.txt b/README.txt
index a6a0978..0aaca6f 100644
--- a/README.txt
+++ b/README.txt
@@ -1,6 +1,14 @@
 XStatic-JQuery-Migrate
 ----------------------
 
+.. warning::
+   This package contains convenience copies of one or more Javascript libraries
+   which in some cases contain known security vulnerabilities. They are
+   included for testing purposes and not intended for security sensitive
+   production deployments. It's assumed that downstream repackaging and
+   distribution channels will supply their own repacement Javascript libraries
+   with backported security fixes when relevant.
+
 JQuery-Migrate JavaScript library packaged for setuptools (easy_install) / pip.
 
 This package is intended to be used by **any** project that needs these files.