diff --git a/.travis.yml b/.travis.yml
index 0113d53..050bab9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: php
-php: [ 7.1, 7.2, nightly ]
+php: [ 7.1, 7.2, 7.3, nightly ]
 sudo: false
 
 env: