Is h4 extension required to be filed with H1B extention?

Hi,
My husband’s h1b is valid till Dec 2019, my h4 visa is valid till july 2020. He is filing h1b extension, do we need to file h4 extension along with it or the validity is fine.

Its not required to file H4 extention with H1B if H4 has long validity.

But, if H4 is going to expire within 6 months, you should file it with H1b extension.