diff --git a/src/pages/sw.js.ts b/src/pages/sw.js.ts
index 9a81e24..34effe0 100644
--- a/src/pages/sw.js.ts
+++ b/src/pages/sw.js.ts
@@ -2,8 +2,14 @@ import type { APIRoute } from "astro";
 import * as fs from "node:fs";
 import * as path from "node:path";
 
-export const GET: APIRoute = ({params, request}) => {
-    const filePath = path.resolve(process.cwd(), "dist/sw.js");
-    const fileContents = fs.readFileSync(filePath);
-    return new Response(fileContents, { status: 200, headers: { 'Content-Type': 'application/javascript' } });
-}
\ No newline at end of file
+export const GET: APIRoute = ({ params, request }) => {
+  if (process.env.MODE !== "development") {
+    return new Response();
+  }
+  const filePath = path.resolve(process.cwd(), "dist/sw.js");
+  const fileContents = fs.readFileSync(filePath);
+  return new Response(fileContents, {
+    status: 200,
+    headers: { "Content-Type": "application/javascript" },
+  });
+};