diff --git a/.travis.yml b/.travis.yml
index ba6984565..18919653d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 dist: trusty
+version: ~> 1.0
 language: php
 php:
 # the latest and greatest, has some issues that are excluded below in matrix.allow_failures