diff --git a/.travis.yml b/.travis.yml
index 2d293654..4b2f01c1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,7 @@
+# .travis.yml development advice: check your changes at
+# https://config.travis-ci.com/explore
+os: linux
+dist: bionic
 language: node_js
 branches:
   except:
@@ -24,8 +28,8 @@ after_success:
   - npm install -g codecov
   - npm run codecov
 
-include:
-  jobs:
+jobs:
+  include:
     - name: deps:npm-audit
       stage: cron
       install: