diff --git a/.travis.yml b/.travis.yml
index de5ff68..5478573 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,14 +2,22 @@ language: php
 
 php:
   - 5.3
+  - 5.4
   - 5.5
+  - 5.6
+
+env:
+  - SYMFONY_VERSION="2.3.*"
+  - SYMFONY_VERSION="2.4.*"
+  - SYMFONY_VERSION="2.5.*"
+  - SYMFONY_VERSION="2.6.*"
 
 before_script:
-  - composer install
+  - composer require symfony/http-kernel:${SYMFONY_VERSION}
 
 script:
   - phpunit
 
 branches:
   only:
-      - master
+    - master
diff --git a/composer.json b/composer.json
index d2ae6f3..e6d6a0f 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     }
   ],
   "require": {
-    "symfony/http-kernel": "~2.4"
+    "symfony/http-kernel": "~2.3"
   },
   "autoload": {
     "psr-0": {