diff --git a/lib/index.js b/lib/index.js
index 460c6d5..f93a691 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -14,8 +14,6 @@ const escape_html = require('escape-html');
 const { src, dest, dev } = require('./config.js');
 
 function connect_dev() {
-	// create main.js and server-routes.js
-	// TODO update on changes
 	create_app();
 
 	const watcher = create_watcher();
@@ -137,6 +135,10 @@ function get_route_handler(fn) {
 					const mod = require(server.entry)[route.id];
 
 					if (route.type === 'page') {
+						// preload main.js and current route
+						// TODO detect other stuff we can preload? images, CSS, fonts?
+						res.set('Link', `<${client.main_file}>;rel="preload";as="script", <${client.routes[route.id]}>;rel="preload";as="script"`);
+
 						let data = { params: req.params, query: req.query };
 						if (mod.preload) data = Object.assign(data, await mod.preload(data));
 
diff --git a/lib/utils/generate_asset_cache.js b/lib/utils/generate_asset_cache.js
index 0310d89..c15f935 100644
--- a/lib/utils/generate_asset_cache.js
+++ b/lib/utils/generate_asset_cache.js
@@ -5,10 +5,12 @@ const templates = require('../templates.js');
 const route_manager = require('../route_manager.js');
 const { dest } = require('../config.js');
 
+function ensure_array(thing) {
+	return Array.isArray(thing) ? thing : [thing]; // omg webpack what the HELL are you doing
+}
+
 module.exports = function generate_asset_cache(clientInfo, serverInfo) {
-	let main_file = Array.isArray(clientInfo.assetsByChunkName.main) ?
-		`/client/${clientInfo.assetsByChunkName.main[0]}` : // omg webpack what the HELL are you doing
-		`/client/${clientInfo.assetsByChunkName.main}`;
+	const main_file = `/client/${ensure_array(clientInfo.assetsByChunkName.main)[0]}`;
 
 	const chunk_files = clientInfo.assets.map(chunk => `/client/${chunk.name}`);
 
@@ -29,6 +31,11 @@ module.exports = function generate_asset_cache(clientInfo, serverInfo) {
 				return lookup;
 			}, {}),
 
+			routes: route_manager.routes.reduce((lookup, route) => {
+				lookup[route.id] = `/client/${ensure_array(clientInfo.assetsByChunkName[route.id])[0]}`;
+				return lookup;
+			}, {}),
+
 			index,
 			service_worker
 		},