Carrying yarn in back of baby blanket

hi, I am new here but I have a puzzling question. I am in the process of making the knitted sailboat baby blanket and it calls for carrying yarn in the back sometimes over 5 stitches. do I back the blanket or is this normal and safe for baby. Thank you.pshuttle

You can catch the ‘float’, the yarn strand’ in the middle st of the 5 to secure it down a little more.