diff --git a/.travis.yml b/.travis.yml
index 61db724d4..15fc55642 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ before_script:
 script:
   - npm -v
   - commitlint-travis
+  - "! grep -R --exclude-dir='*/node_modules/*' --include=package-lock.json 'http:' ."
   - npm test
   - npm run dist
 after_success: