diff --git a/.travis.yml b/.travis.yml
index c1a007a..36ef397 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,15 +1,16 @@
-language: node_js
+language:        node_js
+sudo:            required
 os:
   - linux
 node_js:
-  - "8"
+  - "9.2.1"
 
 before_install:
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 script:
-  - npm i --depth 0 --silent 
+  - npm install --depth 0 --silent 
   - npm run lint
   - travis_retry npm run test:export
   - travis_retry npm run test:docs