diff --git a/.travis.yml b/.travis.yml
index 567b40f..20fe4ef 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,7 @@ cache:
 
 before_script:
   - composer self-update
-  - composer install --prefer-source --no-interaction
+  - composer install --prefer-dist --no-interaction
 
 script:
   - phpunit