diff --git a/.travis.yml b/.travis.yml
index 4d52286ae5..0f2a8641d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,7 +23,7 @@ before_install:
 before_script:
     ## Composer
     - composer self-update
-    - composer install --prefer-source
+    - composer install --prefer-dist
     ## PHPDocumentor
     - mkdir -p build/docs
     - mkdir -p build/coverage