diff --git a/tsup.config.ts b/tsup.config.ts
index 2403a039..f1053c75 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -11,5 +11,5 @@ export default await defineConfig({
   clean: true,
   splitting: false,
   dts: true,
-  esbuildPlugins: [esbuildPluginFilePathExtensions()],
+  esbuildPlugins: [esbuildPluginFilePathExtensions({cjsExtension: 'js'})],
 });