diff --git a/.travis.yml b/.travis.yml
index 4173b0b..c64694a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ php:
   - 7.1
   - hhvm
 
+dist: trusty
 sudo: false
 
 install: travis_retry composer install --no-interaction --prefer-source