diff --git a/.travis.yml b/.travis.yml
index 3f46814e5..15e4b29b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ script:
 branches:
   only:
     - master
+    - /^(\d+\.)+(\d+\.)+(\d+)?(-)?(.+)$/
 deploy:
   provider: npm
   email: manager@mathjax.org