On your site – http://prntscr.com/m2lp2r
4.5.3 version is available for auto-update. If you prefer manually updating, just let us know and we will send the latest theme version to your registration email.
When I try to update automatically through wordpress it fails every time, I manually updated by downloading through themeforest and it still shows 4.5.2. If you could send me the newest version that would be great!