diff --git a/packages/vite/src/node/build.ts b/packages/vite/src/node/build.ts
index 9a3a2a65702e58..10f9d31bf39838 100644
--- a/packages/vite/src/node/build.ts
+++ b/packages/vite/src/node/build.ts
@@ -471,10 +471,10 @@ async function doBuild(
           ? resolveLibFilename(libOptions, output.format || 'es', config.root)
           : path.posix.join(options.assetsDir, `[name].[hash].js`),
         chunkFileNames: libOptions
-          ? `[name].js`
+          ? `[name].[hash].js`
           : path.posix.join(options.assetsDir, `[name].[hash].js`),
         assetFileNames: libOptions
-          ? `[name].[ext]`
+          ? `[name].[hash].[ext]`
           : path.posix.join(options.assetsDir, `[name].[hash].[ext]`),
         // #764 add `Symbol.toStringTag` when build es module into cjs chunk
         // #1048 add `Symbol.toStringTag` for module default export