diff --git a/src/utils/static.ts b/src/utils/static.ts
index 3aca8fe1..65594c8f 100644
--- a/src/utils/static.ts
+++ b/src/utils/static.ts
@@ -15,6 +15,7 @@ export async function serveStatic(
 ): Promise<false | undefined | null | BodyInit> {
   if (event.request.method !== "GET" && event.request.method !== "HEAD") {
     if (!options.fallthrough) {
+      event.response.headers.set("allow", "GET, HEAD");
       throw createError({
         statusMessage: "Method Not Allowed",
         statusCode: 405,