diff --git a/ts/vite.config.ts b/ts/vite.config.ts
index 011b56d9d..4b1b56e8d 100644
--- a/ts/vite.config.ts
+++ b/ts/vite.config.ts
@@ -28,6 +28,8 @@ export default defineConfig({
     },
     build: {
         reportCompressedSize: false,
+        // defaults use chrome87, but we need 77 for qt 5.14
+        target: ['es2020', 'edge88', 'firefox78', 'chrome77', 'safari14']
     },
     server: {
         host: "127.0.0.1",