diff --git a/.travis.yml b/.travis.yml
index bd67cd3..bbc9a77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ env:
 
 before_script:
   - travis_retry composer self-update
-  - travis_retry composer install --no-interaction --prefer-source --dev $PREFER_LOWEST
+  - travis_retry composer update --no-interaction --prefer-source $PREFER_LOWEST
   - travis_retry phpenv rehash
 
 script: