diff --git a/README.md b/README.md
index 6f0ebcd..de31412 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ const postCssPlugin = require("esbuild-plugin-postcss2");
 esbuild.build({
   ...
   plugins: [
-    postCssPlugin.default()
+    postCssPlugin.default({})
   ]
   ...
 });