unable to install elementary os tweaks

i am fairly new to elementary os and linux and i am unable to install elementary os tweaks:

i have run the following commands in terminal before i was able to install it via software center:

sudo apt-add-repository ppa:versable/elementary-update
sudo apt-get update

then i searched in the software center of the elementary tweaks, and i get this error :

package dependencies cannot be resolved.

The following packages have unmet dependencies:

elementary-tweaks: PreDepends: dpkg (>= 1.15.6) but 1.16.1.2ubuntu7.2 is to be installed
                   Depends: libc6 (>= 2.2.5) but 2.15-0ubuntu10.5 is to be installed
                   Depends: libgconf-2-4 (>= 2.31.1) but 3.2.5-0ubuntu2 is to be installed
                   Depends: libgee2 (>= 0.5.0) but 0.6.8-1~precise1 is to be installed
                   Depends: libglib2.0-0 (>= 2.26.0) but 2.32.4-0ubuntu1 is to be installed
                   Depends: libgranite2 (>= 0.2.0) but it is not going to be installed
                   Depends: libgtk-3-0 (>= 3.2.1) but 3.4.2-0ubuntu0.6 is to be installed
                   Depends: libpango1.0-0 (>= 1.14.0) but 1.30.0-0ubuntu3.1 is to be installed