unmet dependencies: postgresql-contrib-9.1

[Noah]

Hi there,

What is the best way to circumvent this issue and install 
postgresql-contrib-9.1

# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
  postgresql-contrib-9.1 : Depends: postgresql-9.1 (= 
9.1.14-0ubuntu0.12.04) but 9.1.13-0ubuntu0.12.04 is installed
E: Unmet dependencies. Try using -f.

Cheers