diff --git a/composer.json b/composer.json
index 082ce4f..70e7b5b 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     },
     "require": {
         "php": ">=5.6",
-        "symfony/http-kernel": "^2.8",
+        "symfony/http-kernel": "^3.0",
         "symfony/serializer": "^3.0",
 	"symfony/property-access": "^3.0",
         "jrfnl/PHP-cast-to-type": "^2.0",
@@ -31,12 +31,12 @@
         "alecsammon/php-raml-parser": "To use the RAML APISpec"
     },
     "require-dev": {
-        "atoum/atoum": "^2.6",
+        "atoum/atoum": "^2.0",
         "atoum/stubs": "*",
         "silex/silex": "^2.0",
-        "alecsammon/php-raml-parser": "^2.0",
-        "friendsofphp/php-cs-fixer": "^1.1",
-		"squizlabs/php_codesniffer": "^2.6"
+        "alecsammon/php-raml-parser": "^2.2",
+        "friendsofphp/php-cs-fixer": "^2.0",
+		"squizlabs/php_codesniffer": "^2.0"
     },
 	"scripts": {
         "post-install-cmd": [