diff --git a/src/index.ts b/src/index.ts
index 06135d7c..88b6e999 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -149,6 +149,8 @@ export async function build(_options: Options) {
             configName: item?.name,
             options: {
               ...options, // functions cannot be cloned
+              banner: undefined,
+              footer: undefined,
               esbuildPlugins: undefined,
               esbuildOptions: undefined,
               plugins: undefined,