diff --git a/.travis.yml b/.travis.yml
index 41aca20..e23121c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,11 @@ language: php
 
 php:
   - 5.3
+  - 5.4
+  - 5.5
   - 5.6
+  - 7.0
+  - 7.1
 
 # also test against HHVM, but require "trusty" and ignore errors
 matrix: