They are both acceptable. One just sounds more archaic than the other.
Both of them can be used. Dreamt is just more common in the British language.
I dreamed about an elephant in the grass.
The duration of We Dreamed America is 2880.0 seconds.
difference between as on and as at
We Dreamed America was created on 2008-10-06.
I Dreamed of Africa was released on 05/05/2000.
The Production Budget for I Dreamed of Africa was $34,000,000.
I Dreamed We Fell Apart was created in 2004.
I Dreamed of Africa - book - was created in 1991.
The Spanish phrase "Soñé contigo" is often used to say "I dreamed of you," though literally translated it means "I dreamed with you."
Rodgers and Hammerstein wrote "I Have Dreamed" for "King and I"
The duration of The Woman That Dreamed About a Man is 1.67 hours.