diff --git a/.travis.yml b/.travis.yml
index 5df9d84..86e19f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ sudo: false
 
 matrix:
   include:
-    - php: 5.4
+    - php: 5.5
       env: 'COMPOSER_FLAGS="--prefer-stable --prefer-lowest"'
 
 before_script: