diff --git a/.travis.yml b/.travis.yml
index fe6e4f1..a7ade87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,4 +9,7 @@ before_script:
 php:
   - 5.3
   - 5.4
+  - 5.5
+  - 5.6
+  - 7.0