diff --git a/.travis.yml b/.travis.yml
index 3f632e3..b371c6d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,13 @@ php:
   - 5.6
   - 7.0
   - 7.1
-  - hhvm
+
+matrix:
+  include:
+    - php: hhvm
+      dist: trusty
+  allow_failures:
+    - php: hhvm
 
 before_script:
   - sh -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then echo "session.serialize_handler = php" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi;'