diff --git a/.travis.yml b/.travis.yml
index e290684f..27264cbd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ branches:
 php:
   - 7.1
   - 7.2
+  - 7.3
 
 before_install:
   - phpenv config-add data/infra/travis-php/memcached.ini