diff --git a/.travis.install.sh b/.travis.install.sh
deleted file mode 100755
index 3c6e699..0000000
--- a/.travis.install.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-set -x
-if [ "$TRAVIS_PHP_VERSION" = 'hhvm' ] || [ "$TRAVIS_PHP_VERSION" = 'hhvm-nightly' ]; then
-    curl -sS https://getcomposer.org/installer > composer-installer.php
-    hhvm composer-installer.php
-    hhvm -v ResourceLimit.SocketDefaultTimeout=30 -v Http.SlowQueryThreshold=30000 composer.phar install --prefer-source
-else
-    composer self-update
-    composer install --prefer-source
-fi
diff --git a/.travis.yml b/.travis.yml
index 54854f9..3241ad5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,17 +3,11 @@ language: php
 php:
   - 5.5
   - 5.6
-  - 7
+  - 7.0
   - hhvm
-  - hhvm-nightly
 
-matrix:
-  fast_finish: true
-  allow_failures:
-    - php: hhvm-nightly
-
-before_script:
-  - ./.travis.install.sh
+install:
+  - travis_retry composer install --no-interaction --ignore-platform-reqs
 
 script:
-  - ./vendor/bin/phpunit
+  - composer test
diff --git a/composer.json b/composer.json
index ba8756c..4714181 100644
--- a/composer.json
+++ b/composer.json
@@ -33,7 +33,7 @@
         }
     },
     "require": {
-        "php": "^5.5",
+        "php": ">=5.5",
         "psr/log": "^1.0"
     },
     "require-dev": {