Please follow the instruction below 
if the Update button is not displayed in Google Play or App Store even after the game update is complete.

▷ Update button not displayed in Google Play
Google Play > Profile at the top right > Manage Apps & Device > Updates Available > Update [Dice Kingdom - Tower Defense]
* If the problem persists, Settings on your device > Apps > Google Play Store > Storage > Clear Cache

▷ Update button not displayed in the App Store
App Store > Profile at the top right > Check if the Update button for [Dice Kingdom - Tower Defense] is displayed in Settings
* Refresh the page if the game is not displayed in the list of updates.