lxc upgrading

Trying to upgrade the lxc version from 0.7.5 to 0.8.0. Executed following command :
apt-get install lxc
But it didnt work the package is still 0.7.5.
apt-get install lxc=0.8.0
Gives error saying
E: Version '0.8.0' for 'lxc' was not found
How to upgrade it to next version (0.8.0 the specific)? Please help! Thanks!