diff --git a/.travis.yml b/.travis.yml
index aa7a488..7e3b54d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,13 @@ php:
   - hhvm
 
 before_script:
-  - composer install --prefer-source --dev
+  - if [ $(phpenv version-name) = "hhvm" ]; then sudo mv /etc/hhvm /etc/hhvm.orig; fi
+  - if [ $(phpenv version-name) = "hhvm" ]; then sudo apt-get update; fi
+  - if [ $(phpenv version-name) = "hhvm" ]; then sudo apt-get install hhvm -qq -y --force-yes; fi
+  - if [ $(phpenv version-name) = "hhvm" ]; then sudo mv /etc/hhvm /etc/hhvm.new; fi
+  - if [ $(phpenv version-name) = "hhvm" ]; then sudo mv /etc/hhvm.orig /etc/hhvm; fi
+  - composer self-update
+  - composer install --prefer-source
 
 script: phpunit -c tests/phpunit.xml.dist