You're not going to see gains unless you increase your weight, so I hope you're continuing to challenge yourself. But while I want you to increase the weight, I don't want you to increase it so much that you can't complete the prescribed amount of repetitions. Select weight that allows you to perform the reps and still feel like you could eke out 1-2 more.
As you become more fit, you may notice you can cruise through these workouts quickly. I encourage you to constantly keep strength and power foremost in your mind and challenge yourself every workout.