In order to protect the website, you are required to create a PR before merging to the gh-pages branch; in order to do this, you should:

1. (After cloning the CSV Validator repo) Switch to the gh-pages branch
2. Create a new branch based on this branch i.e. git checkout -b gh-pages-update
3. Make your changes and push them to GitHub
4. Click the "Compare and pull request" button
5. You Should see "base:master <- compare <your branch name>"
6. Click the base:master dropdown menu and select gh-pages which will enable you to see all the changes between the gh-pages branch and yours
7. Click the "Create pull request" button
8. Once you get approval, merge the branch