diff --git a/.travis.yml b/.travis.yml
index c35625b1..9c5e11a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,19 +2,32 @@ language: php
 
 php:
   - 5.2
-  - 5.3.3
   - 5.3
+  - 5.3.3
   - 5.4
   - 5.5
   - 5.6
   - hhvm
  
 matrix:
-    allow_failures:
-        - php: hhvm
+  allow_failures:
+    - php: hhvm
+
+before_script:
+  ## Packages
+  - sudo apt-get -qq update > /dev/null
+  ## Composer
+  ##@todo Remove when support of 5.2 will be dropped
+  - phpenv global 5.3
+  - composer self-update
+  - composer install --prefer-source --dev
+  - phpenv global "$TRAVIS_PHP_VERSION"
 
 script:
- - phpunit -c ./unitTests/
+  ## PHP_CodeSniffer
+  - ./vendor/bin/phpcs Classes/ unitTests/ --standard=PSR2 -n --ignore=Classes/PHPExcel/Shared/PCLZip
+  ## PHPUnit
+  - phpunit -c ./unitTests/
 
 notifications:
-  email: false
+  email: false
\ No newline at end of file
diff --git a/composer.json b/composer.json
index ff18cb84..da7faa0e 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         },
         {
             "name": "Franck Lefevre",
-            "homepage": "http://blog.rootslabs.net"
+            "homepage": "http://rootslabs.net"
         },
         {
             "name": "Erik Tilt"
@@ -26,6 +26,9 @@
         "ext-xml": "*",
         "ext-xmlwriter": "*"
     },
+    "require-dev": {
+        "squizlabs/php_codesniffer": "1.*"
+    },
     "recommend": {
         "ext-zip": "*",
         "ext-gd2": "*"