Ubuntu - cronjob entry to print dpkg --getselections to a file every week?

Question

I would like to run a job, which will execute the below command every week.

$ dpkg --get-selections > /home/me/package_list.log

So I tried the following.

$ sudo crontab -e

Added entry like this,

0 2 * * * dpkg --get-selections > /home/me/package_list.log

But it doesnt work. What am I missing and what can I do to fix this?

Thank You.