diff --git a/.changeset/empty-chicken-refuse.md b/.changeset/empty-chicken-refuse.md
new file mode 100644
index 000000000000..b473aa7b4d72
--- /dev/null
+++ b/.changeset/empty-chicken-refuse.md
@@ -0,0 +1,6 @@
+---
+'astro': patch
+'@astrojs/svelte': patch
+---
+
+Fix PostCSS config not applied to Svelte component by default