diff --git a/README.md b/README.md
index 29cea10..65617f7 100644
--- a/README.md
+++ b/README.md
@@ -103,5 +103,5 @@ Resources
 You can run the unit tests with the following command:
 
     $ cd path/to/Symfony/Component/OptionsResolver/
-    $ composer.phar install --dev
+    $ composer.phar install
     $ phpunit