diff --git a/.travis.yml b/.travis.yml
index 6527b0f..196ac98 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,12 +9,14 @@ addons:
     - google-chrome-stable
 language: node_js
 node_js:
-- '6'
+- '8'
 cache:
 - node_modules
 before_install:
 - export DISPLAY=:99.0
 - sh -e /etc/init.d/xvfb start
+- npm config set package-lock false
+- npm i -g npm@^5.7.1
 install:
 - npm install @ckeditor/ckeditor5-dev-tests
 - ckeditor5-dev-tests-install-dependencies