i have the same but i have closed permit and got open work permit for my wife,
here's details from (http://www.cic.gc.ca/english/work/apply-who.asp)
Your spouse or common-law partner may be able to apply for an “open” work permit. This is a permit that will let them accept any job with any employer if:
You are
approved to work in Canada for six months or longer,
doing work in Canada that meets a minimum skill level (usually work for which you need at least a college diploma) and
doing a job at Skill Level 0, A or B in the National Occupational Classification.
Note: If you have a post-graduation work permit, your spouse must attach a copy of your work permit to their application for an open work permit, as well as a:
letter from your current employer that confirms you work there, or a copy of your employment offer or contract, and
copy of one of your pay slips.
Or,
You are approved to work in Canada and your spouse or common-law partner is eligible for a work permit through a pilot project.
In each case, your spouse’s permit will be valid no longer than yours.