diff --git a/book/book.toml b/book/book.toml
index f397aef04..e6d3eee36 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -4,3 +4,6 @@ language = "en"
 multilingual = false
 src = "src"
 theme = "colibri"
+
+[output.html]
+cname = "docs.helix-editor.com"