Clinical Research Directory

Inclusion Criteria: * Participants will be adults with depression (PhQ 9 \> 10; cut-off for moderate depression) and insomnia (Insomnia Severity Index \> 11) who also meet DSM-V criteria for depression and insomnia (APA, 2013) and have a good understanding of French. Exclusion Criteria: * Participants requiring different treatment, i.e. those with symptoms suggestive of psychotic disorder, bipolar disorder, substance abuse disorder, excessive suicidal ideation, or other sleep pathology (such as sleep apnea, restless legs syndrome, narcolepsy, sleepwalking, or periodic limb movements) * Participants who have recently received or are currently receiving other interventions that could be confused with our intervention, such as those undergoing treatment for sleep or depression, or those undergoing parallel psychological or pharmacological treatment (antidepressants and anxiolytics will be accepted provided they have been stabilized for at least two months and there are no planned changes in the following weeks). * Participants with commitments that disrupt nocturnal sleep cycles and habits, such as those who no longer work or who work night shifts, will also be excluded from the study.