diff --git a/lib/utils/create_app.js b/lib/utils/create_app.js
index 87f8e93..1cc5375 100644
--- a/lib/utils/create_app.js
+++ b/lib/utils/create_app.js
@@ -30,7 +30,7 @@ module.exports = function create_app(src, dest, routes, options) {
 
 		// need to fudge the mtime, because webpack is soft in the head
 		const { atime, mtime } = fs.statSync(file);
-		fs.utimesSync(file, atime.getTime() - 999999, mtime.getTime() - 999999);
+		fs.utimesSync(file, new Date(atime.getTime() - 999999), new Date(mtime.getTime() - 999999));
 	}
 
 	function create_server_routes() {
@@ -47,7 +47,7 @@ module.exports = function create_app(src, dest, routes, options) {
 		fs.writeFileSync(server_routes, `${imports}\n\n${exports}`);
 
 		const { atime, mtime } = fs.statSync(server_routes);
-		fs.utimesSync(server_routes, atime.getTime() - 999999, mtime.getTime() - 999999);
+		fs.utimesSync(server_routes, new Date(atime.getTime() - 999999), new Date(mtime.getTime() - 999999));
 	}
 
 	// TODO in dev mode, watch files