diff --git a/.changeset/pre.json b/.changeset/pre.json
index 6cd5be767a62..33c83cdf1bda 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -1165,6 +1165,7 @@
     "strong-cooks-run",
     "strong-cooks-turn",
     "strong-cups-yell",
+    "strong-experts-begin",
     "strong-files-obey",
     "strong-kangaroos-work",
     "strong-laws-press",
diff --git a/packages/kit/CHANGELOG.md b/packages/kit/CHANGELOG.md
index 33678ed9aff1..ff0f6afd6111 100644
--- a/packages/kit/CHANGELOG.md
+++ b/packages/kit/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @sveltejs/kit
 
+## 1.0.0-next.520
+
+### Patch Changes
+
+- [fix] ensure serialized headers check is always applied ([#7221](https://github.com/sveltejs/kit/pull/7221))
+
 ## 1.0.0-next.519
 
 ### Patch Changes
diff --git a/packages/kit/package.json b/packages/kit/package.json
index 184de32198b6..9dcc7eea0da1 100644
--- a/packages/kit/package.json
+++ b/packages/kit/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@sveltejs/kit",
-	"version": "1.0.0-next.519",
+	"version": "1.0.0-next.520",
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/sveltejs/kit",