The Alberta Court of Appeal has increased Lily Choy's six-year sentence to eight years in the death of a three-year-old boy in her care in 2007.
The foster mother was convicted of manslaughter in 2011, four years after the toddler died of massive head injuries.
Choy was first sentenced to three years before an appeal led to a second trial where a judge handed Choy six years, saying as a registered nurse Choy should have been aware of how serious the injuries were to the toddler.
The Crown appealed, calling for a harsher sentence. On Monday, the appeal court announced Choy's sentence would be lengthened to eight years.