From 076069f7dc1ef8991aa3a575d76bf53f7ccca7da Mon Sep 17 00:00:00 2001
From: Rich Harris <hello@rich-harris.dev>
Date: Mon, 3 Jan 2022 16:31:37 +0000
Subject: [PATCH] only set cache-control: immutable when appropriate

---
 .changeset/wild-eyes-walk.md         | 5 +++++
 packages/adapter-node/src/handler.js | 7 ++++---
 2 files changed, 9 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/wild-eyes-walk.md

diff --git a/.changeset/wild-eyes-walk.md b/.changeset/wild-eyes-walk.md
new file mode 100644
index 000000000000..02da6fd2ddc8
--- /dev/null
+++ b/.changeset/wild-eyes-walk.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': patch
+---
+
+Only set cache-control: immutable when appropriate
diff --git a/packages/adapter-node/src/handler.js b/packages/adapter-node/src/handler.js
index b4a01ab35ee1..3344430adc4c 100644
--- a/packages/adapter-node/src/handler.js
+++ b/packages/adapter-node/src/handler.js
@@ -18,14 +18,15 @@ const __dirname = path.dirname(fileURLToPath(import.meta.url));
 /**
  * @param {string} path
  * @param {number} max_age
+ * @param {boolean} immutable
  */
-function serve(path, max_age) {
+function serve(path, max_age, immutable = false) {
 	return (
 		fs.existsSync(path) &&
 		sirv(path, {
 			etag: true,
 			maxAge: max_age,
-			immutable: true,
+			immutable,
 			gzip: true,
 			brotli: true
 		})
@@ -80,7 +81,7 @@ function sequence(handlers) {
 
 export const handler = sequence(
 	[
-		serve(path.join(__dirname, '/client'), 31536000),
+		serve(path.join(__dirname, '/client'), 31536000, true),
 		serve(path.join(__dirname, '/static'), 0),
 		serve(path.join(__dirname, '/prerendered'), 0),
 		ssr