A 25-year-old female with type 1 diabetes, since age ten, has had fasting blood sugars over 150 mg / dL for the last several months. Blood sugars at bedtime have been at goal, usually between 120–130 mg / dL. She denies any episodes of hypoglycemia. She is not snacking before bed. She is currently taking glargine 10 units at bedtime and lispro 3–5 units before each meal.

What change should she make to her regimen?