diff --git a/vite.config.ts b/vite.config.ts
index a6bd060..5cb5943 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -23,7 +23,6 @@ export default defineConfig(({ mode }) => {
           entry: path.resolve(__dirname, 'src/index.ts'),
           name: 'CesiumPlot',
           fileName: 'CesiumPlot',
-          formats: ['umd'],
         },
         rollupOptions: {
           external: ['cesium'],