diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 37dc6cc..3b55e1a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,7 +30,7 @@ pages:
     - cd ..
     # simulate the drive being inserted
     - mv simulated-usb-butter.html usb-butter.html
-    - "sed -i 's/^baseurl.*/baseurl: \"\/butter-box-ui\"/' _config.yml"
+    - "sed -i 's/^baseurl.*/baseurl: \"\\/butter-box-ui\"/' _config.yml"
     - bundle exec jekyll build -d public
   artifacts:
     paths: