diff --git a/packages/firebase-frameworks/src/sveltekit/index.ts b/packages/firebase-frameworks/src/sveltekit/index.ts
index c99765c5..c3b41e6b 100644
--- a/packages/firebase-frameworks/src/sveltekit/index.ts
+++ b/packages/firebase-frameworks/src/sveltekit/index.ts
@@ -26,7 +26,20 @@ export const handle = async (req: Request, res: Response) => {
     return res.writeHead(404, "Not Found").end();
   }
 
-  const body = await rendered.text();
+  let body;
+  const contentType = rendered.headers.get("Content-Type");
+  if (
+    contentType.startsWith("text/") ||
+    contentType.startsWith("application/json") ||
+    contentType.startsWith("application/xml") ||
+    contentType.startsWith("application/javascript") ||
+    contentType.startsWith("application/vnd.ms-excel")
+  ) {
+    body = await rendered.text();
+  } else {
+    body = Buffer.from(await rendered.arrayBuffer());
+  }
+
   return res.writeHead(rendered.status, Object.fromEntries(rendered.headers)).end(body);
 };