Inclusion Criteria:  Must be able to understand and provide written informed consent Scleroderma skin involvement affecting both hands approximately equally Age of at least 18-years-old Male or female Ability to engage in twice weekly UVA1 sessions No changes in systemic therapy during the first 100 days of the study period  Exclusion Criteria:  On photosensitizing medication Inability to complete study visits UV light therapy in the 4 weeks prior to entering the study Commercial tanning or excessive sun exposure in the 4 weeks prior to entering the study Current pregnancy or planned pregnancy during the study period Use of topical therapies other than emollients (suprapotent corticosteroids) in the 2 weeks prior to entering the study History of intolerance to ultraviolet light Any other condition that will disqualify the patient from the study in the opinion of the investigator