Add link to Travis CI page.
diff --git a/README.md b/README.md
index 5730ddc..348c453 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,6 @@
If you want to reach the authors in private, use <libzip@nih.at>.
-
+[](https://travis-ci.org/nih-at/libzip)
[](https://ci.appveyor.com/project/0-wiz-0/libzip)
