Inclusion Criteria:  Moderate to severe depression, defined by a score ≥ 26 on the Inventory of Depressive Symptomatology - Self Rated (IDS-SR) DSM-5 diagnosis of MDD confirmed with the M.I.N.I. version 7.0.2. for DSM-5  Moderate to severe childhood trauma (CT) before the age of 18, defined by a score above validated cut-off on one or more of the following domains of the 28-item Childhood Trauma Questionnaire Short Form (CTQ-SF):  physical neglect: score ≥ 10 emotional neglect: score ≥ 15 sexual abuse: score ≥ 8 physical abuse: score ≥10 emotional abuse: score ≥ 13 Sufficient mastery of Dutch language  Exclusion Criteria:  Previous TFT on CT Other lifetime severe psychiatric comorbidity (bipolar disorder, psychotic disorder) Current alcohol/drug dependence Primary diagnosis of post-traumatic stress disorder (PTSD) or Acute Stress Disorder (ASD) Lifetime diagnosis of borderline personality disorder (BPD)