diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fd7d9df
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+composer.lock
+vendor/
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 8d75dbe..ba9c27c 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,9 @@
         "source": "https://github.com/M6Web/Symfony2-coding-standard",
         "issues": "https://github.com/M6Web/Symfony2-coding-standard/issues"
     },
+    "require": {
+        "squizlabs/php_codesniffer": "~1.0"
+    },
     "suggest": {
         "squizlabs/php_codesniffer": "PHP CodeSniffer",
         "m6web/coke": "PHP CodeSniffer configurator"