diff --git a/.travis.yml b/.travis.yml
index e046827f0..d7973fcc1 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ script:
   - if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT; fi
 
 install:
-  - travis_retry composer install --no-interaction --prefer-source
+  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer install --no-interaction --prefer-dist
 
 # cache vendors
 cache: