diff --git a/.travis.yml b/.travis.yml
index 8039e1d47e..c89ad38661 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ before_script:
   - sh -c "if [ '$DB' = 'mysql' ]; then mysql -e 'create database IF NOT EXISTS phpbb_tests;'; fi"
   - travis/install-php-extensions.sh
   - cd phpBB
-  - php ../composer.phar install --dev
+  - php ../composer.phar install --dev --no-interaction --prefer-source
   - cd ..
   - sh -c "if [ `php -r "echo (int) version_compare(PHP_VERSION, '5.3.19', '>=');"` = "1" ]; then travis/setup-webserver.sh; fi"