This is what they write for these changes:
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***IMPORTANT***: You must inform this office immediately if any of the following changes apply to your situation:
• Marriage or common-law union, divorce, annulment, legal separation;
• Death of the sponsor, the principal applicant or any accompanying family member;
• Birth or adoption of a child, including grandchildren born to dependent children;
• You, the principal applicant, or any of your family members have been charged or convicted of a
criminal offence in any country.
Please use the following link to inform our office of any of the changes indicated above:
https://secure.cic.gc.ca/enquiries-renseignements/canada-case-cas-eng.aspx
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Hope that helps!