A composition for treating cancer is disclosed. The composition includes a lentiviral particle and an aminobisphosphonate drug. The lentiviral particle is capable of infecting a target cell, such as a cancer cell, and includes an envelope protein optimized for targeting such target cell and a viral vector. The viral vector includes a small RNA optimized to target an FDPS mRNA sequence. The aminobisphosphonate drug includes zoledronic acid.