diff --git a/configs/tsdown/js-library.ts b/configs/tsdown/js-library.ts
index f87a9b9f4..49ab3bd97 100644
--- a/configs/tsdown/js-library.ts
+++ b/configs/tsdown/js-library.ts
@@ -1,7 +1,7 @@
 import fs from 'fs';
 import path from 'path';
 import { defineConfig, type Rolldown } from 'tsdown';
-import { createBasePlugin } from './plugins';
+import { createBasePlugin } from './plugins.ts';
 
 
 const customNoExternal = new Set([