diff --git a/.travis.yml b/.travis.yml
index 20416ce..0efda41 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ php:
 
 before_install:
   - composer self-update
-  - composer install --dev
+  - composer install --dev -n
   - pyrus install pear/PHP_CodeSniffer
   - phpenv rehash