diff --git a/.travis.yml b/.travis.yml
index 966ddbc..d283f91 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ after_success: |
[ $TRAVIS_BRANCH = master ] &&
[ $TRAVIS_PULL_REQUEST = false ] &&
cargo doc &&
- echo "" > doc/index.html &&
+ echo '' > doc/index.html &&
sudo pip install ghp-import &&
ghp-import -n doc &&
git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages