diff --git a/.travis.yml b/.travis.yml
index 9d20eb3..4d44f52 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,14 @@
 sudo: false
 language: php
 php:
-- '5.6'
-- '5.5'
-- '5.4'
+  - nightly
+  - 5.6
+  - 5.5
+  - 5.4
+
+matrix:
+  allow_failures:
+    - php: nightly
 
 before_install:
   - npm install -g npm@latest