The aim of the study is to test the feasibility and acceptability of internet-based Cognitive Behaviour Therapy (CBT) for persons diagnosed with bipolar disorder, type II. The idea is to treat residual depressive symptoms as well as using psychoeducation to improve their prognosis. Each participant will have a personal therapist that will provide guidance and support throughout the treatment.

Inclusion Criteria:

• A diagnosis of bipolar disorder type II
• Mild to moderate depressive symptoms
• 18 years of age
• Stable medication with a mood stabiliser
• Access to the internet

Exclusion Criteria:

• Diagnosis of psychosis
• Having received psychiatric in-patient care during the past year
• Ongoing psychotherapy
• Previous manic episode
• Previous suicide attempt
• Previous parasuicidal behavior documented in patient record (e.g. self-injury)