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.

Qur’an says:

 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]