diff --git a/backend/index.js b/backend/index.js
index cb7c706..71ff524 100644
--- a/backend/index.js
+++ b/backend/index.js
@@ -37,7 +37,7 @@ const wrap_transport_sendbytes = function (ws, msg_bytes) {
 	return
 }
 
-const start_server = function ({ context_meta, config, jsbuild_app_frontend, handle_transport_bytes }) {
+const start_server = function ({ context_meta, config, jsbuild_app_frontend, handle_transport_bytes, handle_fetch_fallback }) {
 	const make_session_object = (ws) => {
 		const map_obj = {
 			ws,
@@ -130,7 +130,12 @@ const start_server = function ({ context_meta, config, jsbuild_app_frontend, han
 				resp = new Response('Upgrade failed', { status: 500 })
 			}
 			else {
-				resp = new Response(null, { status: 404 })
+				if (handle_fetch_fallback !== undefined) {
+					resp = handle_fetch_fallback(req)
+				}
+				if (resp === undefined) {
+					resp = new Response(null, { status: 404 })
+				}
 			}
 			return resp
 		},
@@ -225,6 +230,7 @@ const async_run = async function ({
 	config,
 	jsbuild_app_frontend,
 	handle_transport_bytes,
+	handle_fetch_fallback,
 }) {
 	const active_config = {
 		// defaults
@@ -239,7 +245,7 @@ const async_run = async function ({
 	const context_meta = {
 		ws_map: new Map(),
 	}
-	const server = start_server({ context_meta, config: active_config, jsbuild_app_frontend, handle_transport_bytes })
+	const server = start_server({ context_meta, config: active_config, jsbuild_app_frontend, handle_transport_bytes, handle_fetch_fallback })
 	console.info(`framerock app now running at ${active_config.hostname}:${active_config.port}`)
 	process.on('SIGINT', async () => {
 		console.log('SIGINT intercepted')
diff --git a/package.json b/package.json
index 117284f..ad29767 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "framerock",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "type": "module",
   "main": "backend/index.js"
 }