diff --git a/themes/gitbook/index.js b/themes/gitbook/index.js
index 0878dc0c..bb75e59b 100644
--- a/themes/gitbook/index.js
+++ b/themes/gitbook/index.js
@@ -1,3 +1,5 @@
+'use client'
+
 import CONFIG from './config'
 import { useRouter } from 'next/router'
 import { useEffect, useState, createContext, useContext } from 'react'