diff --git a/.travis.yml b/.travis.yml
index b29432eeff8a28e2af5359f47bd6923553a039d4..63ceca6a17156f589e69ada67a13b5a8d9ab6e11 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ matrix:
   allow_failures:
   - php: hhvm
 before_script:
-- if [[ "$TRAVIS_PHP_VERSION" == "5.3" -o "$TRAVIS_PHP_VERSION" == "5.4" ]];
+- if [[ "$TRAVIS_PHP_VERSION" == "5.3" || "$TRAVIS_PHP_VERSION" == "5.4" ]];
   then composer install --dev --prefer-lowest; else
   composer install --dev;
   fi