Help please!

I recently had a baby 4 month ago and my husband and I moved for his job. He now has longer hours but that has really started to get in between us having sex. He works 6-4 most days and when he gets home i try to give him his own time to unwind usually my daughter and I will go on a walk or to the store when he gets home. But still by the night when she is in bed he doesn’t want to have sex. Says he is too tired but will still stay up for another hour or two doing other things. Then on the weekend he gets his own time and I’ll get mine and still when she goes down for bed he will be too tired. I just want my sex life back but don’t know how to approach the situation. I understand work is exhausting but I feel like our sex life still needs to be important.