diff --git a/.changeset/famous-dancers-tan.md b/.changeset/famous-dancers-tan.md
new file mode 100644
index 0000000000..814655d644
--- /dev/null
+++ b/.changeset/famous-dancers-tan.md
@@ -0,0 +1,5 @@
+---
+'astro': major
+---
+
+unify preview server config