diff --git a/.travis.yml b/.travis.yml
index 74dc0340..d7eb212b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,17 +1,36 @@
-sudo: false
-
 language: php
+
 php:
     - 5.3
     - 5.4
     - 5.5
+    - 5.6
+    - 7.0
+
+
+cache:
+    directories:
+        - $HOME/.composer/cache
+
+matrix:
+    include:
+        - php: 5.3
+          env: 'COMPOSER_FLAGS="--prefer-lowest --prefer-stable"'
+        - php: 5.4
+          env: 'COMPOSER_FLAGS="--prefer-lowest --prefer-stable"'
+        - php: 5.5
+          env: 'COMPOSER_FLAGS="--prefer-lowest --prefer-stable"'
+        - php: 5.6
+          env: 'COMPOSER_FLAGS="--prefer-lowest --prefer-stable"'
+        - php: 7.0
+          env: 'COMPOSER_FLAGS="--prefer-lowest --prefer-stable"'
 
 branches:
     only:
         - master
 
 before_script:
-    - composer update --prefer-source
+    - composer update --prefer-source $COMPOSER_FLAGS
 
 script:
     - bin/phpspec run -fpretty
diff --git a/README.md b/README.md
index fdd99738..f4586081 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ DictionaryBundle
 Are you often tired to repeat static choices like gender or civility in your apps ?
 
 ## Requirements
-- Symfony >= 2.4
+- Symfony >= 2.5
 
 ## Installation
 Add the DictionaryBundle to your `composer.json`:
diff --git a/composer.json b/composer.json
index 54066690..cad35287 100644
--- a/composer.json
+++ b/composer.json
@@ -17,17 +17,17 @@
     "minimum-stability": "stable",
     "require": {
         "php": ">=5.3",
-        "symfony/http-kernel": "~2.4",
-        "symfony/dependency-injection": "~2.4",
-        "symfony/http-foundation": "~2.4",
-        "symfony/config": "~2.4",
-        "symfony/form": "~2.4",
-        "symfony/validator": "~2.4",
+        "symfony/http-kernel": "~2.5",
+        "symfony/dependency-injection": "~2.5",
+        "symfony/http-foundation": "~2.5",
+        "symfony/config": "~2.5",
+        "symfony/form": "~2.5",
+        "symfony/validator": "~2.5",
         "twig/twig": "~1.11",
         "fzaninotto/faker": "^1.5"
     },
     "require-dev": {
-        "phpspec/phpspec": "~2.0",
+        "phpspec/phpspec": "~2.5",
         "bossa/phpspec2-expect": "~1.0"
     },
     "config": {