Interwar depth charges gained explosive power

Were depth charges significantly improved between the world wars?

Yes, naval depth charges became much more powerful, but early air-dropped anti-submarine bombs were still weak.

Improved naval depth charges differed from the small anti-submarine bombs initially carried by aircraft. Naval charges grew substantially more powerful, whereas the air-dropped weapons weighed only about one or two hundred pounds and disappointed despite high expectations. Weapon labels alone do not reveal the effectiveness of early airborne anti-submarine attack.