diff --git a/.travis.yml b/.travis.yml
index 2675499cfb963d6e02c6ef0e03a743b6c28d1402..1f81f3ee7df3619e398ef9ff692a7c9599b9f1ac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ install:
   - ./elasticsearch-${ES_VERSION}/bin/elasticsearch -d
 before_script:
   - composer config -g github-oauth.github.com $GITHUB_COMPOSER_AUTH
-  - composer install --no-interaction
+  - composer install --no-interaction --prefer-dist
 script:
   - wget -q --waitretry=1 --retry-connrefused -T 10 -O - http://127.0.0.1:9200
   - vendor/bin/phpunit --coverage-clover=coverage.clover