diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 2aeca44..26ba427 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -23,6 +23,7 @@ jobs:
           mkdir gh-pages
           mv docs/en/gh-pages gh-pages/en
           mv docs/index.html gh-pages
+          mv docs/CNAME gh-pages
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v2.5.1
         with:
diff --git a/docs/CNAME b/docs/CNAME
new file mode 100644
index 0000000..ab2afa5
--- /dev/null
+++ b/docs/CNAME
@@ -0,0 +1 @@
+xplr.dev