diff --git a/packages/next-themes/tsup.config.js b/packages/next-themes/tsup.config.js
index 9fc87ab..747b0d4 100644
--- a/packages/next-themes/tsup.config.js
+++ b/packages/next-themes/tsup.config.js
@@ -3,6 +3,9 @@ import { defineConfig } from 'tsup'
 export default defineConfig({
   sourcemap: false,
   minify: true,
+  banner: {
+    js: `'use client'`
+  },
   dts: true,
   format: ['esm', 'cjs'],
   loader: {