Raid5 mdadm array change size

I have created a raid5 array with 4 disks. Initially i had 3x 3tb and 1x 4tb (because 3tb was unavailable at the time). After some years i have replaced most of these disks and have come to the point where all array disks are now 4tb in size. Still my mdadm array is 3TB. Is there any way to change the mdadm array size to match the 4tb disk size w/o loosing my data? Thanks for your help!