diff --git a/.travis.yml b/.travis.yml
index 9d290446b..9eb87c044 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,7 @@ branches:
     - master
     # enable building tags
     - /^v\d+\.\d+(\.\d+)?(-\S*)?$/
+    - "5.9"
 
 cache:
   yarn: true