Arch Linux and keys update Linux 02.02.2016

Today I tried to update my arch box and got the following error

error: confuse: signature from "Thorsten Töpper <>" is unknown trust

I have fixed it with following command

sudo pacman-key --refresh-keys

If you want to add specified key use following command

gpg --keyserver hkp:// --recv-keys C1A60EACE707FDA5