Employees section: change google+ to tumblr

Hi and thx for this great theme and your big support! FETT!
my employees havent google+ or twitter accounts. but we all have tumblr.
is there any opportunity to change this?

css:

.team-social .fa-twitter:before {
content: ‘\f173’;
}

f173-code: http://fontawesome.io/cheatsheet/

Hello,

This topic is already marked as Resolved.

Can you please confirm that you solved your issue?

Kind Regards, Roman.