diff --git a/.travis.yml b/.travis.yml
index b57a23a..b1359eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,5 @@
 language: php
-dist: trusty
 php:
-- '5.5'
 - '5.6'
 - '7.0'
 - '7.1'