diff --git a/.travis.yml b/.travis.yml
index 861c160a250dcd8418834b011944b851eb118064..462144489ed95719e1ed68581e9b0f34c79c86e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 sudo: false
 
 addons:
+  firefox: "47.0.1"
   postgresql: "9.3"
   apt:
     packages: