diff --git a/.travis.yml b/.travis.yml
index 3b42073..48e1ad3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,11 @@
 language: php
 
 php:
+  - 5.6
   - 5.5
   - 5.4
   - 5.3
+  - hhvm
 
 before_install:
   - sudo easy_install Pygments
@@ -18,4 +20,4 @@ script:
   - php vendor/bin/security-checker security:check composer.lock
 
 after_script:
-  - php vendor/bin/coveralls
\ No newline at end of file
+  - php vendor/bin/coveralls