[gnome-love] Problem with GTK version

[Chamila Adhikarinayake <cka adhi gmail com>]

HI, 

I'm using Ubuntu 12.04. When i tried to build a project from source (Gnote) i got following message

configure: error: Package requirements (gtk+-3.0 >= 3.6) were not met:
Requested 'gtk+-3.0 >= 3.6' but version of GTK+ is 3.4.2

I guess i have to update the GTK+. can some one tell me how

thanks in advance