Type 1: Does Lantus cause weight gain?

Over the past couple of months my long honeymoon period seems to be slowly disappearing and I've been gradually increasing my Lantus dose to retain the same fasting levels.

I am eating the same diet as always and exercising the same amount (if not more) than I did previously. My control remains tight. Nothing has changed except my Lantus dose. I am convinced the increased Lantus is causing weight gain: I have gained 5kg in the last couple of months and my waist has also gained a couple of inches.

Are there any studies on Lantus causing weight gain?

Thanks. Looks like there are a few studies showing Levemir is less likely to lead to weight gain than Lantus. Maybe I'll speak to my team about switching.