diff --git a/.travis.yml b/.travis.yml
index c797481f2..efe678ba3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ before_script:
   - if [[ $TRAVIS_PHP_VERSION = '5.6' && $DB = 'sqlite' ]]; then PHPUNIT_FLAGS="--coverage-clover ./build/logs/clover.xml"; else PHPUNIT_FLAGS=""; fi
   - if [[ $TRAVIS_PHP_VERSION != '5.6' && $TRAVIS_PHP_VERSION != 'hhvm' && $TRAVIS_PHP_VERSION != '7.0' ]]; then phpenv config-rm xdebug.ini; fi
   - composer self-update
-  - composer install --prefer-source --dev
+  - composer install --prefer-source
 
 script:
   - ENABLE_SECOND_LEVEL_CACHE=0 ./vendor/bin/phpunit -v -c tests/travis/$DB.travis.xml $PHPUNIT_FLAGS