The Qur’an is the only divine scripture still retain without any changes in it script. Also it does not have any changes until the end of world.
إِنَّا نَحْنُ نَزَّلْنَا ٱلذِّكْرَ وَإِنَّا لَهُ لَحَافِظُونَ
Indeed, it is We who have sent down the Reminder [i.e. the Qur’an], and indeed, We will be its guardian. [15:9]