diff --git a/.travis.yml b/.travis.yml
index 698a3baf..13c917f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,10 @@ sudo: false
 language: php
 php:
   - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
 install:
   - composer install
 script:
diff --git a/README.md b/README.md
index 82a01564..ba2fe58f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ Analyze PHP code with one command.
 [![Dependency Status](https://www.versioneye.com/user/projects/5566c1666365390010c20000/badge.svg?style=flat)](https://www.versioneye.com/user/projects/5566c1666365390010c20000)
 [![Build Status](https://travis-ci.org/EdgedesignCZ/phpqa.svg)](https://travis-ci.org/EdgedesignCZ/phpqa)
 
+## Requirements
+
+- PHP >= 5.4.0
+
 ## Why?
 
 Every analyzer has different arguments and options in different formats *(no surprise in PHP world :)*.