diff --git a/src/kiri-run/worker.js b/src/kiri-run/worker.js
index a92b230d..7c772d8d 100644
--- a/src/kiri-run/worker.js
+++ b/src/kiri-run/worker.js
@@ -16,6 +16,7 @@ import { render } from '../kiri/render.js';
 import { wasm_ctrl } from '../geo/wasm.js';
 import { version } from '../moto/license.js';
 import { Widget, newWidget } from '../kiri/widget.js';
+import { load } from "../load/png.js";
 
 import { CAM } from '../kiri-mode/cam/driver-be.js';
 import { DRAG } from '../kiri-mode/drag/driver.js';
diff --git a/src/kiri/main.js b/src/kiri/main.js
index aef9f121..433a01d9 100644
--- a/src/kiri/main.js
+++ b/src/kiri/main.js
@@ -18,7 +18,7 @@ import { space as SPACE } from '../moto/space.js';
 import { stats } from '../kiri/stats.js';
 import { noop, utils } from '../kiri/utils.js';
 import { version } from '../moto/license.js';
-import { Widget } from './widget.js';
+import { Widget, newWidget } from './widget.js';
 import { showTools } from '../kiri-mode/cam/tools.js';
 
 let { parseOpt, o2js, js2o, ls2o } = utils,
diff --git a/src/load/png.js b/src/load/png.js
index bd029144..26983b84 100644
--- a/src/load/png.js
+++ b/src/load/png.js
@@ -28,7 +28,7 @@ function parseAsync(bin, opt) {
  * opt.base = base added thickness in mm
  */
 function parse(bin, opt = {}) {
-    let img = new png.PNG();
+    let img = new PNG();
     let progress = opt.progress || noop;
     let ondone = opt.done || noop;
     img.parse(bin, (err, output) => {