diff --git a/.travis.yml b/.travis.yml
index 6bc71cc..d7367e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: php
 php:
   - 5.3.3
   - 5.4
+  - 5.5
 branches:
   only:
     - 7.x