Inclusion Criteria:  At least 16 years of age A principal diagnosis of adjustment disorder according to ICD-11 Have symptoms in the mild to moderate range Be able to read and write in Swedish Have access to a computer with Internet connection If the participant is on sick leave then the sick leave period should have a maximum duration of 1 month at maximum 50% of working time  Exclusion Criteria:  Ongoing other psychological treatment for stress-related problems