diff --git a/.travis.yml b/.travis.yml
index d60d64a..251647b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,6 +34,7 @@ install:
   - travis_retry composer install --prefer-dist --no-interaction
 
 before_script:
+  - echo "memory_limit=-1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - php -r "echo INTL_ICU_VERSION . \"\n\";"
   - php -r "echo INTL_ICU_DATA_VERSION . \"\n\";"
   - mysql --version