My LG Stylo won't update to 6.0

[AC Question]

I just got my Virgin Mobile LG G Stylo after my old phone completely bit the dust. I'm trying to update it from it's stock 5.1.1 to 6.0 Marshmallow. Instead everytime I go to the update, it hust says LS770ZV5_16-LS770ZV7_15_update.zip and it doesn't give a button for me to update. I can still use my phone but I cannot get it to update.