diff --git a/.travis.yml b/.travis.yml
index d1b540f..c7ea96f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,8 @@ php:
   - 5.3
   # aliased to a recent 5.4.x version
   - 5.4
+  # aliased to a recent 5.5.x version
+  - 5.5
 
 before_script:
   - composer install --dev