diff --git a/tsup.config.ts b/tsup.config.ts
index b6b4e4f9..f13b48d5 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -5,6 +5,9 @@ export default defineConfig({
   name: 'tsup',
   dts: {
     resolve: true,
+    // build types for `src/index.ts` only
+    // otherwise `Options` will not be exported by `tsup`, not sure how this happens, probbably a bug in rollup-plugin-dts
+    entry: './src/index.ts',
   },
   esbuildPlugins: [
     {