PokerStars No-Limit Hold'em, $0.05 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

UTG ($11.50)
MP ($6.82)
Hero (Button) ($9.91)
SB ($13.65)
BB ($6.05)

Preflop: Hero is Button with J, J
UTG raises to $0.20, 1 fold, Hero raises to $0.50, 2 folds, UTG calls $0.30

Flop: ($1.07) 4, 5, 8 (2 players)
UTG bets $0.30, Hero raises to $1, UTG raises to $1.70,
Hero ??