diff --git a/.travis.yml b/.travis.yml
index 1a8d1964de..2b79696091 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,14 @@
 language: node_js
+sudo: false
 node_js:
-  - "0.10"
-  - "0.12"
+  - 0.10
+  - 0.12
+  - 4
 env:
   - NODE_ENV=travis
+matrix:
+  allow_failures:
+    - node_js: 4
 services:
   - mongodb
 before_install:
@@ -20,3 +25,8 @@ notifications:
     on_success: change  # options: [always|never|change] default: always
     on_failure: always  # options: [always|never|change] default: always
     on_start: never     # options: [always|never|change] default: always
+cache:
+  apt: true
+  directories:
+  - node_modules/
+  - public/lib/