diff --git a/.travis.yml b/.travis.yml
index 29b167b..8acb121 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: node_js
 node_js:
   - "6"
 addons:
-  firefox: "55.0"
+  firefox: "56.0"
 before_script:
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start