diff --git a/.travis.yml b/.travis.yml
index 47f715f..9363a86 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,14 @@ language: php
 php:
   - 5.3
   - 5.4
-
+  - 5.5
+  - 5.6
+  - hhvm
+ 
+matrix:
+    allow_failures:
+        - php: hhvm
+        
 before_script:
     - composer self-update
     - composer install --dev