Inclusion Criteria:  have received a diagnosis of non-metastatic cancer (any type) to be aged 18 years and older to be readily able to read and understand French or English having the minimum cognitive abilities to read, understand and memorize information having access to Internet  Exclusion Criteria:  having a psychological comorbidity needing clinical attention (e.g., major depressive disorder) having severe cognitive impairments (e.g., diagnosis of Parkinson's disease, dementia) having insomnia due to a temporary condition (e.g., acute pain, short-term medication side effects, environmental factors)