diff --git a/.travis.yml b/.travis.yml
index 847fa135..b8062bbf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ php:
 
 matrix:
   allow_failures:
+    - php: 5.3.3
     - php: 5.6
     - php: hhvm