fix doc badge URL

diff --git a/README.md b/README.md
index 93e1755637a026513cb13c2963f273ded2b7f0ae..a9dda8261c2857a95ba7668b68e557f59d4c28d5 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Latest Docs](https://readthedocs.org/projects/pip/badge/?version=latest)](http://nlopt.readthedocs.io/en/latest/)
+[![Latest Docs](https://readthedocs.org/projects/nlopt/badge/?version=latest)](http://nlopt.readthedocs.io/en/latest/)
 [![Build Status](https://travis-ci.org/stevengj/nlopt.svg?branch=master)](https://travis-ci.org/stevengj/nlopt)
 [![Build Status](https://ci.appveyor.com/api/projects/status/github/stevengj/nlopt?branch=master&svg=true)](https://ci.appveyor.com/project/StevenGJohnson/nlopt)